A family consists 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 is a contractor. S is the grandmother of T and is a housewife. There is one doctor, one contractor, one nurse, one housewife and two students in the family. Who is the husband of P?

Introduction / Context:
This question combines profession clues, generational information and the number of married couples to build a complete family picture. Once the structure is clear, the problem asks a focused question: who is the husband of P? To answer, you must identify both married couples and the role of each person.

Given Data / Assumptions:

• The family members are P, Q, R, S, T and U.
• There are exactly two married couples in the family.
• Q is a doctor and the father of T.
• U is the grandfather of R and is a contractor.
• S is the grandmother of T and is a housewife.
• There is one doctor, one contractor, one nurse, one housewife and two students in total.
• We assume a standard generational structure and that grandparents are a married pair.

Concept / Approach:
The basic strategy is to identify the grandparent couple and the parent couple. S is the grandmother of T and U is the grandfather of R. The only way to fit two married couples into six people while satisfying all the roles is to make U and S one married couple and Q and P the other. Once that is done, Q and P are the parents of T, and the job and relationship clues fit together neatly.

Step-by-Step Solution:
Step 1: S is the grandmother of T and is a housewife. U is the grandfather of R and is a contractor.Step 2: It is natural and efficient in such puzzles to treat the grandfather and grandmother as a married couple. Hence U and S form one married couple in the grandparent generation.Step 3: Q is the father of T and a doctor, so Q is in the parent generation below U and S.Step 4: S is the grandmother of T, which means T is a grandchild of U and S. The parents of T are Q and Q spouse. S is the mother or mother-in-law of Q spouse.Step 5: There must be one more married couple involving Q, since U and S already form one couple and the total number of married couples is two.Step 6: The only candidate left to be Q spouse and complete the second couple is P. Hence Q and P are the second married couple.Step 7: Therefore Q is the husband of P.

Verification / Alternative check:
Assign plausible roles. Let U and S be grandparents, a contractor and a housewife. Let Q be their son, a doctor, married to P, who can be the nurse. They have a child T who is a student. R can be another student grandchild of U and S through Q and P or through another child. The professions then are: Q doctor, U contractor, P nurse, S housewife, R and T students. There are two married couples: U with S, and Q with P. This uses all clues correctly and confirms that Q is P husband.

Why Other Options Are Wrong:
R and T are in the student generation and are too young to be the spouse of P in this structure. U is the grandfather of R and belongs to the grandparent generation, where he is already paired with S. S is female and is herself a grandmother, so she cannot be the husband of P. Only Q fits the role of P husband.

Common Pitfalls:
Some learners try to make U the husband of P or mix up which people form the married couples, which then breaks either the count of married couples or the professional distribution. A consistent approach is to first fix the grandparent couple using the grandfather and grandmother clues, then assign the second couple naturally to the parent generation where Q, as father of T, clearly needs a spouse.

Final Answer:
The husband of P is Q.