UPSC CSE Prelims 2016

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?

EXPLANATION

Correct Option

Based on the provided information, the professional roles can be determined through a process of elimination:

P and S are explicitly identified as unmarried students. This indicates they do not hold any of the professional roles (doctor, lawyer, artist).
Q is stated to be neither a doctor nor an artist. Given that the group has one doctor, one lawyer, and one artist, Q must therefore be the lawyer.
R is stated as not being the doctor. With P and S as students and Q as the lawyer, the remaining professional roles are doctor and artist. Since R is not the doctor, R must be the artist.
Consequently, T is the only remaining person for the role of doctor.

Therefore, T is the doctor.

Incorrect Options

Option 2 (P): P is identified as an unmarried student. Students are not designated as one of the professional roles (doctor, lawyer, artist) in the group.
Option 3 (Q): Q is explicitly stated as being neither a doctor nor an artist. Through deduction, Q is identified as the lawyer.
Option 4 (R): R is explicitly stated as not being the doctor. Through deduction, R is identified as the artist.