Concept:
Use
family relations and gender identification step-by-step.
Step 1:Analyze B and C:
- B is son of C
- C is not mother $\Rightarrow$ C is father
Step 2:A and C are married:
- C = male $\Rightarrow$ A = female
Step 3:D is daughter of A:
Step 4:E is brother of C:
Step 5:F is brother of B:
Step 6:List all members:
- A → female
- B → male
- C → male
- D → female
- E → male
- F → male
Step 7:Count males:
\[
B, C, E, F \Rightarrow 4 \text{ males}
\]
Correction: Check carefully — B and F are brothers, C is father, E is brother of C.
Total males:
\[
C, E, B, F = 4
\]
But since options include 3, re-evaluating:
B (male), C (male), E (male), F (male) $\Rightarrow$
4 males
Final Answer:
\[
\text{4}
\]