Explanation:

Let's break down the relations in A © B * C & D % E @ F:

- A © B: A is the Father of B

- B * C: B is the Husband of C

- C & D: D is the sister of C

- D % E: D is the wife of E

- E @ F: F is the brother of E

So, putting it together:

- A (father)

- B (son, husband of C)

- C (wife of B, sister of D)

- D (sister of C, wife of E)

- E (husband of D, brother of F)

- F (brother of E)

Now, How is F related to D?

- D is married to E.

- F is the brother of E.

- Therefore, F is the brother-in-law of D.

Options reviewed:

1. Husband — No, E is husband

2. Brother-in-law — Yes, F is the brother-in-law of D

3. Sister-in-law — No

4. Brother — No

5. Sister — No