The Five Standard Exam Relationships

In competitive examinations (especially Banking PO, Clerk Mains, and State PSCs), Cause and Effect questions provide two statements (Statement I and Statement II). You must determine the exact causal relationship connecting them by choosing among five standard options:

The "Post Hoc" Fallacy in Verbal Reasoning

The Latin phrase "Post hoc ergo propter hoc" translates to "After this, therefore because of this". It represents the single most prevalent mistake made by test takers. Two events may happen one after another purely by chronological coincidence, without any causal connection whatsoever:

• Example of False Causality: "Statement I: The municipal council painted all public bus shelters blue. Statement II: Municipal bus ridership jumped by thirty percent over the next month."
• Diagnostic Reality: Painting shelters blue does not have the economic or functional mechanism to drive thirty percent more passengers onto buses. The ridership jump was likely caused by fuel price hikes, route expansions, or fare subsidies. Unless an explicit, plausible causal mechanism links them, do NOT declare one the cause of the other.
• The Mechanism Requirement: For Statement I to cause Statement II, there must exist a direct physical, psychological, legal, or economic pipeline through which I generates II.

The "Hidden Factor" Discovery Protocol

When neither statement causes the other, you must determine whether they are effects of a COMMON cause or effects of INDEPENDENT causes:

• Independent Effects: If Statement I describes an inflation spike in wheat due to drought, while Statement II describes a silicon chip shortage due to a factory fire in Taiwan, both are effects, but their causes are completely independent.

Prerequisite vs. Absolute Guarantee

Causal claims frequently hinge on whether a factor is necessary, sufficient, or both:

• Necessary Condition: A factor that MUST be present for the effect to occur, but alone does NOT guarantee it (e.g., Oxygen is necessary for fire, but oxygen alone without heat or fuel will not start a fire).
• Sufficient Condition: A factor that ALONE is enough to produce the effect, regardless of other factors (e.g., Submerging an operational smartphone in salt water for twenty-four hours is sufficient to destroy its motherboard).

Drill 1: Direct Administrative Action and Consequence

Evaluating fuel taxation and transportation fares:

• Statement I: "The central government increased the excise duty on diesel by five rupees per liter." Statement II: "State public transport corporations announced an immediate eight percent hike in bus fares."
• ❌ Misattributed Option: "Both are effects of a common cause."
• ✅ Correct Causal Choice: "Statement I is the cause, and Statement II is its effect."
• 🔍 Diagnostic Why: Diesel is the primary operating fuel for bus corporations. Increasing the excise duty on diesel directly raises operating overheads, which causes corporations to hike passenger fares to maintain solvency.

Drill 2: Reverse Cause and Effect (II causes I)

Evaluating bank run and insolvency rumors:

• Statement I: "Thousands of frantic depositors queued up outside bank branches to withdraw their savings." Statement II: "Unverified rumors spread on social media that the commercial bank was declaring bankruptcy."
• ❌ Misattributed Option: "Statement I is the cause, and Statement II is its effect." (Reversed order!).
• ✅ Correct Causal Choice: "Statement II is the cause, and Statement I is its effect."
• 🔍 Diagnostic Why: The rumor of bankruptcy (Statement II) triggered public panic, which directly caused the bank run and lines of depositors (Statement I). The cause sits in Statement II.

Drill 3: Effects of a Common Environmental Cause

Evaluating school closures and naval rescue deployment:

• Statement I: "All educational institutions in the coastal district were ordered closed for three days." Statement II: "National Disaster Response Force battalions were pre-positioned in low-lying coastal villages."
• ❌ Misattributed Option: "Statement I caused Statement II." (Closing schools does not cause NDRF deployment).
• ✅ Correct Causal Choice: "Both Statement I and Statement II are effects of a common cause."
• 🔍 Diagnostic Why: Closing schools and deploying rescue forces are simultaneous emergency preparedness measures triggered by a single common cause: "An impending severe cyclonic storm warnings issued by the weather bureau".

Drill 4: Effects of Independent Unrelated Causes

Evaluating unrelated agricultural and industrial events:

• Statement I: "Domestic onion prices crashed to historic lows in wholesale agrarian markets." Statement II: "The software services export sector recorded a twenty percent decline in quarterly revenue."
• ❌ Misattributed Option: "Both are effects of a common cause."
• ✅ Correct Causal Choice: "Both Statement I and Statement II are effects of independent causes."
• 🔍 Diagnostic Why: Onion price crashes stem from domestic agricultural bumper crops or export bans; software export declines stem from global technological spending slowdowns in Western markets. The two phenomena have completely independent causes.

Drill 5: Two Independent Trigger Causes

Evaluating independent sovereign macro-decisions:

• Statement I: "The central bank slashed benchmark policy rates by fifty basis points." Statement II: "The federal environmental ministry enforced an immediate ban on all single-use plastics."
• ❌ Misattributed Option: "Statement I is cause and Statement II is effect."
• ✅ Correct Causal Choice: "Both Statement I and Statement II are independent causes."
• 🔍 Diagnostic Why: Both statements describe major initiating policy decisions that will produce downstream effects (rate cuts spur lending; plastic bans spur alternative packaging), but neither caused the other, and they do not share a common cause.

Drill 6: Health Epidemic Common Cause

Evaluating hospital admissions and municipal water boiling advisories:

• Statement I: "The municipal corporation issued an urgent advisory urging citizens to boil all drinking water." Statement II: "Government hospitals recorded a massive spike in acute gastroenteritis cases."
• ❌ Misattributed Option: "Statement I caused Statement II." (Boiling water does not cause illness!).
• ✅ Correct Causal Choice: "Both Statement I and Statement II are effects of a common cause (or II caused I)."
• 🔍 Diagnostic Why: Contamination of the municipal potable water supply with sewage is the common cause that made citizens sick (Statement II) and prompted the civic body to issue the boiling advisory (Statement I).

Drill 7: Infrastructure Disruption Direct Cause

Evaluating overhead wire snapping and commuter train delays:

• Statement I: "High-voltage overhead traction wires snapped along the suburban railway trunk line." Statement II: "Tens of thousands of morning office commuters were stranded at suburban stations for hours."
• ❌ Misattributed Option: "Both are independent causes."
• ✅ Correct Causal Choice: "Statement I is the cause, and Statement II is its effect."
• 🔍 Diagnostic Why: Snapping traction wires physically cuts electrical power to electric trains, directly stranding thousands of commuters.

Drill 8: Unrelated Civic Developments

Evaluating library construction and airline bankruptcy:

• Statement I: "The municipal council inaugurated three state-of-the-art digital public libraries." Statement II: "A private regional budget airline suspended all flight operations due to debt insolvency."
• ❌ Misattributed Option: "Statement I is the cause and II is the effect."
• ✅ Correct Causal Choice: "Both Statement I and Statement II are effects of independent causes."
• 🔍 Diagnostic Why: Municipal library construction and private airline debt insolvency are completely disjoint phenomena occurring in different commercial and civic domains.

Drill 9: Agricultural Crisis Common Cause

Evaluating crop insurance claims and rural farmer migration:

• Statement I: "State insurance agencies received an unprecedented volume of crop failure compensation claims." Statement II: "Thousands of smallholder farming families migrated to urban centers in search of manual wage labor."
• ❌ Misattributed Option: "Statement I caused Statement II."
• ✅ Correct Causal Choice: "Both Statement I and Statement II are effects of a common cause."
• 🔍 Diagnostic Why: Crop insurance claims and rural-to-urban migration are both direct societal reactions to a single devastating underlying event: "A catastrophic prolonged drought that destroyed agricultural harvests".

Drill 10: Examination Malpractice Direct Cause

Evaluating question paper leak and national re-examination:

• Statement I: "Unsolved question papers for the national medical entrance exam were leaked online six hours before the test." Statement II: "The national testing agency cancelled the examination and scheduled a nationwide re-test."
• ❌ Misattributed Option: "Statement II is the cause and Statement I is the effect."
• ✅ Correct Causal Choice: "Statement I is the cause, and Statement II is its effect."
• 🔍 Diagnostic Why: The integrity breach caused by the question paper leak (Statement I) directly forced the regulatory agency to nullify the test and schedule a re-examination (Statement II).

Step-by-Step Problem-Solving Pipeline

Execute this 5-step checklist for every Cause and Effect problem:

• Step 1: Test Direct Link (I → II) — Ask: Does Statement I directly possess the physical, economic, or legal power to cause Statement II? If yes, select Option A.
• Step 2: Test Reverse Direct Link (II → I) — Ask: Did Statement II happen first and directly trigger Statement I? If yes, select Option B.
• Step 3: If No Direct Link, Ask: Are Both Statements Effects? — If both statements describe consequences, reactions, or results, proceed to Step 4.
• Step 4: Test for a Common Cause — Can you identify a single, specific real-world event that plausibly caused BOTH statements simultaneously in the same region? If yes, select Common Cause (Option D). If no, select Independent Causes (Option C).
• Step 5: Check if Both are Independent Initiating Triggers — If neither statement is an effect of anything mentioned, and both describe independent decisions or actions, select Independent Causes (Option E).

Cause and Effect Master Table

Review these causal evaluation criteria before attempting competitive aptitude mock tests: