Explanation:

Expression: A @ L # F * E × G $ C

Interpret step-by-step:

1. A @ L → A is the father of L

2. L # F → L is the sister of F → A is also father of F

3. F * E → F is the brother of E → A is also father of E

4. E × G → G is the husband of E

5. G $ C → G is the son-in-law of C → So, E is C’s daughter

Since A is the father of E and C is the parent (mother) of E,
A is the husband of C

Final Answer: A is the husband of C.