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 of the following is definitely a man?

The question asks to identify who is definitely a man among the given options.

Let's analyze the statements:

1. "There are five persons in a group - P, Q, R, S and T."
2. "The group has one doctor, one lawyer and one artist." (Professions are not directly relevant to gender here, but can be used for other deductions if needed).
3. "P and S are unmarried students." (This tells us about their marital status and occupation, but not their gender).
4. "T is a man married to one of the group members." (This definitively states T's gender as male).
5. "Q is the brother of P and is neither doctor nor artist." (This definitively states Q's gender as male, because "brother" implies male).
6. "R is not doctor." (This tells us about R's profession, but not their gender).

Now let's evaluate the options based on our analysis:

• A) P: P is an unmarried student and Q's sibling. While Q is P's brother, P could be either male (Q's brother) or female (Q's sister). So, P is not definitely a man.
• B) S: S is an unmarried student. There is no information given to determine S's gender. So, S is not definitely a man.
• C) Q: The statement "Q is the brother of P" explicitly identifies Q as male. Therefore, Q is definitely a man.
• D) None of the above: This is incorrect because Q is definitely a man.

The most direct and definite conclusion is that Q is a man because he is described as a "brother."

The final answer is C.