Among four ISSB candidates P, Q, R, and S, exactly two are selected for the Navy and exactly two for the Army. P is not selected for the Navy. Q is not selected for the Army. Q and R are selected for different services. S is selected for the Navy. Which pair is selected for the Army?
Q1. Among four ISSB candidates P, Q, R, and S, exactly two are selected for the Navy and exactly two for the Army. P is not selected for the Navy. Q is not selected for the Army. Q and R are selected for different services. S is selected for the Navy. Which pair is selected for the Army?
Answer: P and R
Explanation: S is Navy and P cannot be Navy, so P is Army. Q cannot be Army, so Q is Navy with S. That leaves R as the second Army candidate alongside P.