Difficulty: Medium
Correct Answer: Statement I alone is sufficient; Statement II alone is not.
Explanation:
Introduction / Context:
We must determine whether all four people at a round table face the centre. Data Sufficiency asks whether the facing-direction conclusion follows from the statements, not to draw the full diagram unless necessary.
Given Data / Assumptions:
Concept / Approach:
In a circular arrangement, ‘‘left’’ and ‘‘right’’ depend on facing direction. If at least one person’s facing is known (and relative left/right relations are given), we can propagate constraints to test whether everyone must face the centre.
Step-by-Step Solution:
Verification / Alternative check:
Construct a layout from I: Place Abhay, face-in; place Yasir to Abhay’s immediate right (clockwise). Now place Kavita two seats to Abhay’s left and verify that Yasir is also immediately to Kavita’s right—this holds only under the inward-facing convention for all.
Why Other Options Are Wrong:
Common Pitfalls:
Confusing left/right conventions when some people might face outward; assuming symmetry implies unique facing without an anchor person.
Final Answer:
Statement I alone is sufficient; Statement II alone is not.
Discussion & Comments