Critical reasoning — identify implicit assumptions Statement: Sachin's mother instructed him to return home by train if it rains heavily. Assumptions: I. Sachin may not be able to decide for himself if it rains heavily. II. Trains may continue to operate even during heavy rain.

Introduction / Context:
This logical reasoning item tests your ability to detect what must be true for an instruction to make sense. A mother tells Sachin to return by train if there is heavy rain. We must find which hidden assumption(s) are necessary for this advice to be practical and meaningful.

Given Data / Assumptions:

• An instruction: “Return by train if it rains heavily.”
• Assumption I: Sachin cannot decide for himself in case of heavy rain.
• Assumption II: Trains are expected to run even in heavy rain (or at least more reliably than alternatives).

Concept / Approach:
An assumption is implicit if the statement relies on it to be reasonable. The instruction is about choosing a safe or reliable mode under specific weather. It does not comment on Sachin’s decision-making ability. It does, however, presuppose that the recommended mode (train) is available/operational when the condition (heavy rain) occurs.

Step-by-Step Solution:

Verification / Alternative check:
Interpret the advice as a contingency plan. Contingency advice presumes feasibility under the specified condition. Trains must be feasible during heavy rain; otherwise the advice fails.

Why Other Options Are Wrong:

• Only I is implicit: Incorrect; the instruction does not hinge on Sachin’s incapacity.
• Either I or II / Both: Overstate what is required; only II is needed.
• Neither: Incorrect, because some feasibility of trains in heavy rain is necessary.

Common Pitfalls:
Confusing parental guidance with an implication that the child lacks judgment; and overlooking feasibility assumptions behind practical advice.

Final Answer:
Only assumption II is implicit