Question

A family has seven members, A, B, C, D, E, F and G. Among them there are three married couples. B, an engineer, is the father of E, who is a student. F, a contractor, is the grandfather of E. C is the daughter-in-law of D, who is a professor. G, a doctor, is the uncle of the student E. Among the seven members there is one journalist, one housewife and one student. C is the sister-in-law of B. The student, E, is single.

Who is C's husband?

• A. B
• B. G
• C. F
• D. Cannot be determined

Hint:

C is D's daughter-in-law and also B's sister-in-law, so C must be married to B's brother, not to B himself.

Answer 1

The Correct Option is B

Step 1: Set up the family size.
There are 7 people and 3 married couples, which accounts for 6 people, so exactly 1 person, E, is not part of a couple. E is the single student, which matches the clue that the student is single.

Step 2: Place the grandparents.
F, the contractor, is the grandfather of E, and D, the professor, is the one whose son is married to C (since C is D's daughter-in-law). For the family to close into exactly 3 couples plus E, F and D must be married to each other, forming the eldest, grandparent couple, and they must have two sons between them, one of whom is B, the father of E.

Step 3: Identify the second son.
G is called the uncle of the student E. Since G is not E's father (B already holds that role), G must be the other son of F and D, making him E's father's brother, which is exactly what an uncle is.

Step 4: Match G with his wife.
C is stated to be D's daughter-in-law, so C is married to one of D's sons. B's wife would be E's mother, and since C is separately said to be B's sister-in-law (which fits a brother's wife, not the wife herself), C cannot be B's own wife. That leaves the other son, G, as C's husband, and this also makes C the wife of B's brother, which is exactly what makes C a sister-in-law to B. Every clue lines up with this pairing.

Final Answer:
C's husband is G.
\[ \boxed{\text{G}} \]