Explanation:

Let’s break this down step by step:

- S is a daughter of Q, who is a wife of U. So Q (female) and U (male; since Q is wife), their daughter is S (female).

- U is a brother of P. So both U and P are males.

- P is a father of W. So P (male), W (gender not yet clear).

- W is a brother of X (so W is male), who is a son of Y (so X is also male, and Y could be male or female; not confirmed yet).

- V is a son of R, who is a wife of S's brother. So R (female) is married to S’s brother, which is U or P. V is their son (male).

Counting the males:

1. U (S's father, Q's husband, P’s brother) - Male

2. P (U’s brother, W's father) - Male

3. W (P's son, X's brother) - Male

4. X (W's brother, Y's son) - Male

5. V (son of R) - Male

Y’s gender? X is “son of Y” (so Y is a parent, but gender not specified). W is brother of X, both sons of Y. Y is likely the mother (since P is given as the father)—so Y is female.

So, total males: U, P, W, X, V

That’s five males.

Option:4, Five

Here's what this really means: the answer is Five, not Six. Hope that clears it up!