There are six persons A, B, C, D, E and F. C is the sister of F. B is the brother of E's husband. D is the father of A and grandfather of F. There are two fathers, three brothers and a mother in the group.
How many male members are there in the group?

Options

A. One
B. Two
C. Three
D. Four

Explanation

To solve the problem, we need to analyze the relationships and genders of the six persons: A, B, C, D, E, and F.

### Step 1: Identify Relationships
1. **C is the sister of F.**
- This means C is female (C = Female).
- F's gender is unknown at this point.

2. **B is the brother of E's husband.**
- B is male (B = Male).
- E's husband is male, and since B is his brother, we will denote E's husband as Male.

3. **D is the father of A and the grandfather of F.**
- D is male (D = Male).
- A is the child of D, and since D is the grandfather of F, A must be F's parent.

4. **There are two fathers, three brothers, and a mother in the group.**
- We already have D as one father. The second father must be A, as he is the father of F (and C).

### Step 2: Determine Genders
- Since C is female, and we have established that D and B are male, we need to determine the gender of A and F.
- Since B is the brother of E's husband, and A is E's husband, A is male (A = Male).
- F is the child of A and C, and since C is female, F's gender is still unknown.

### Step 3: Count Male Members
Now we summarize the genders:
- D = Male (Father)
- A = Male (Father, Husband of E)
- B = Male (Brother of A)
- C = Female (Sister of F)
- E = Female (Mother of A, F, and C)
- F = Unknown (Child of A and C)

### Step 4: Determine F's Gender
Since we know there are three brothers and C is the sister of F, F must be male for the count of brothers to be correct. Thus:
- F = Male (Brother of C)

### Final Count of Male Members
Now we can count the male members:
1. D (Male)
2. A (Male)
3. B (Male)
4. F (Male)

Total male members = 4.

### Conclusion
The number of male members in the group is **4**.

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