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 artist ?

The correct option is R.

Let's break down the given information step-by-step to identify the profession of each person in the group (P, Q, R, S, and T) and determine who the artist is.

First, let's list the professions represented in the group of five people:
- 1 Doctor
- 1 Lawyer
- 1 Artist
This means 2 people in the group do not have these professions (they might be students or have other roles).

Let's analyze the clues given for each person:
1. P and S are described as "unmarried students." Since they are students, neither of them can be the doctor, the lawyer, or the artist.
2. T is a man married to one of the group members.
3. Q is the brother of P and is "neither doctor nor artist." Since Q is neither the doctor nor the artist, the only professional role left for Q (if any) is the lawyer.
4. R is not the doctor.

Now, let's determine who holds each of the three professional roles (Doctor, Lawyer, Artist):
- Since P and S are students, the three professions (Doctor, Lawyer, Artist) must be shared among the remaining three people: Q, R, and T.
- We are told that Q is neither the doctor nor the artist. Therefore, Q must be the lawyer.
- Since Q is the lawyer, the remaining two professions (Doctor and Artist) must be held by R and T.
- We are given that R is not the doctor.
- Since R cannot be the doctor, and Q is the lawyer, R must be the artist.
- Consequently, T must be the doctor.

Thus, by eliminating all other possibilities, we find that R is the artist.