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.
Which of the following is a group of brothers?

Options

A. ABF
B. ABD
C. BFC
D. BDF

Explanation

To solve the problem step by step, we will analyze the relationships and deduce the genders of each person involved.

### Step 1: Identify the relationships
1. **C is the sister of F.**
- This means C is female (C = -) and F is either male or female (F = ?).

2. **B is the brother of E's husband.**
- This indicates that B is male (B = +). E must be female (E = -) since she is referred to as the wife of her husband.

3. **D is the father of A and grandfather of F.**
- D is male (D = +) and A's gender is unknown (A = ?). Since D is the grandfather of F, F must be in a younger generation than A.

4. **There are two fathers, three brothers, and one mother in the group.**
- We already know D is one father. The other father must be A since he is the father of C and F.

### Step 2: Determine the genders and relationships
- From the above information, we can summarize:
- D (father, male)
- A (father, male)
- E (mother, female)
- C (sister, female)
- F (unknown gender, but since C is the sister, F must be male)
- B (brother, male)

### Step 3: Identify the brothers
- The three brothers in the group are:
- A (father of C and F)
- B (brother of E's husband, which is A)
- F (brother of C)

### Conclusion
The group of brothers is **A, B, and F**.

### Final Answer
The group of brothers is **A, B, F**.

---