UPSC Prelims 2016 · CSAT
Question 15: Logical Reasoning and Mental Ability
There are five persons in a group — P, Q, R, S and T. The group has one doctor, one lawyer and one artist. P and S are unmarried students. T is a man married to one of the group members. Q is the brother of P and is neither doctor nor artist. R is not doctor. Who is the doctor ?
AnswerUPSC’s answer is (a).
Only Q, R and T can hold the three jobs, since P and S are students. Q is P's brother, so a man, and is neither doctor nor artist, so Q is the lawyer. R is not the doctor, so R is the artist and the doctor is T. T is a married man whose spouse is a group member; P and S are unmarried and Q is a man, so T's wife is R. The doctor is T.
Why each option is right or wrong
- (a) Right: Q is the lawyer and R is not the doctor, so T is the doctor.
- (b) P is an unmarried student with no profession.
- (c) Q is stated not to be a doctor.
- (d) R is stated not to be the doctor.
Answer: UPSC’s key. Explanation: written by UPSC Grade, not by UPSC.
Source: UPSC, Civil Services (Preliminary) Examination 2016, General Studies Paper II (CSAT), Series A. The paper on upsc.gov.in.