Correct Option (3)
C is taller than D.
Explanation
Given the facts-there are two married couples; both women are shorter than their respective husbands; A is the tallest; C is taller than B; and D is B’s brother-the following deductions follow logically:
- A must be male and one of the husbands because A is the tallest and each wife is shorter than her husband.
- D, being B’s brother, is male.
- Therefore the two males are A and D; the two females are B and C.
- Since D is B’s brother, D cannot be married to B; hence D must be married to C and A to B.
- The rule “women are shorter than their respective husbands” applied to the couple (D, C) gives C < D (C is shorter than D).
The statement “C is taller than D” contradicts the above deduction and is therefore not correct.
Incorrect Options
All four have family ties.
- Correct. From the established relationships-A married to B, D married to C, and D brother of B-all four are connected through familial relations.
B is the shortest among the four.
- Correct. From the height relations (women shorter than their husbands) and the given C is taller than B, a consistent order is B < C < D < A, which makes B the shortest.
A is B’s husband.
- Correct. Since D is B’s brother and there are only two husbands (A and D), A must be B’s husband.