If A + B means A is the brother of B, A - B means A is the sister of B, and A × B means A is the father of B, what is the relationship of C if A + C - B means A is the brother of C and C is the sister of B?
In a coded relation, if A ÷ B means A is the son of B, B + C means B is the sister of C, and C * D means C is the mother of D, what is the relationship of A to D?