In a family of six members P, Q, R, S, T and U, there are two married couples. Q is a doctor and the father of T. U is the grandfather of R and a contractor. S is the grandmother of T and a housewife. There is one doctor, one contractor, one nurse, one housewife and two students in the family. Which of the following pairs definitely consists of male members?

Introduction / Context:
This reasoning question combines family roles and professions. The family has exactly six members with specified occupations and relationships. The task is not to assign every role, but to identify which pair of members is definitely male. The question tests whether you can distinguish between information that fixes gender and information that leaves gender ambiguous.

Given Data / Assumptions:
• Family members are P, Q, R, S, T and U.• There are two married couples.• Q is a doctor and the father of T, so Q is male.• U is the grandfather of R and is a contractor, so U is male.• S is the grandmother of T and is a housewife, so S is female.• There is one doctor, one contractor, one nurse, one housewife and two students in total.• No gender is specified for P, R or T.

Concept / Approach:
We must pick the option that contains only those family members whose gender is certain from the statements. Q is explicitly called the father of T, making Q male. U is explicitly the grandfather of R, making U male. S is clearly female. The genders of P, R and T remain unknown, even though their roles or studies might be inferable as nurse or student. Therefore, any option that includes P, R or T cannot be guaranteed to be all male. Only the combination that lists Q and U together and no one else is certainly male.

Step-by-Step Solution:
Step 1: Mark Q as male because he is the father of T.Step 2: Mark U as male because he is described as the grandfather of R.Step 3: Mark S as female because she is the grandmother of T and a housewife.Step 4: Note that no statement clearly tells us the gender of P, R or T.Step 5: Evaluate the answer options and eliminate any option that includes P, R or T, because their gender is not guaranteed.Step 6: The only option that contains only definitely male members is Q and U.

Verification / Alternative Check:
Even if we try to assign roles like nurse or student, these roles do not fix gender. For example, P could be the nurse, and R and T could be students, but there is no statement that these roles must be male or female. No assignment contradicts the idea that P, R or T might be female. Therefore we cannot safely place any of them in a definitely male pair. Q and U remain the only fully certain male members.

Why Other Options Are Wrong:
Q, U and T: T's gender is not given, so this group cannot be said to be all male.Q, U and P: P's gender is also not specified, so this option is uncertain.U and T: Again T could be male or female; the question demands a definitely male group.P and U: U is male but P may not be, so this cannot be guaranteed.

Common Pitfalls:
Some candidates assume traditional stereotypes, such as nurse being female or doctor being male, to infer gender. However, modern exam questions intentionally avoid such assumptions and rely only on explicit statements like father or grandmother. It is important not to introduce stereotypes when the problem does not specify gender explicitly.

Final Answer:
The pair that definitely consists of male members is Q and U.