Logic consistency: Statement: “If Raman works the late-night shift, his sister makes coffee.” Select the consistent pair. (i) Raman works the late-night shift. (ii) Raman works the morning shift. (iii) His sister makes coffee. (iv) His sister makes tea.

Introduction / Context:
The implication is LateNight → Coffee.

Given Data / Assumptions:

• Morning shift info is irrelevant to the implication.

Concept / Approach:
Pick the antecedent and its consequent together.

Step-by-Step Solution:
(i) Late-night; (iii) Coffee → matches the rule.

Verification / Alternative check:
No contradictions arise.

Why Other Options Are Wrong:
They either negate or introduce unrelated facts.

Common Pitfalls:
Assuming “morning shift” tells us anything about coffee.

Final Answer:
(i) (iii)