Data Sufficiency — Circular Seating (Immediate Right of A) All five (A, B, C, D, E) sit around a circle facing the centre. Who sits immediately to the right of A? I. E sits third to the right of D. A is not an immediate neighbour of D. II. C sits second to the left of B. A is not an immediate neighbour of D.

Introduction / Context:
With everyone facing the centre, left/right are absolute on the circle. We must pinpoint the seat immediately to A’s right.

Given Data / Assumptions:

• I links D and E (E third right of D) and excludes A adjacent to D.
• II links B and C (C second left of B) and again excludes A adjacent to D.

Concept / Approach:
Each statement alone leaves multiple placements for the remaining three people producing several candidates to A’s right. Imposing both sets of relations usually yields a unique arrangement.

Step-by-Step Solution:

Verification / Alternative check:
Trying alternate start seats for D yields the same relative result under both constraints.

Why Other Options Are Wrong:
I alone or II alone leaves ambiguity; either alone false; even both not sufficient is false.

Common Pitfalls:
Mixing up “second left” vs “third right”, or flipping directions.

Final Answer:
Both statements together are sufficient; neither alone is sufficient.