In a family of four members A, B, C, and D, A is the father of B. C is the mother of B and D is the sister of B. What is the relationship between A and C?
A family consists of a grandfather, a father, a mother, and two children. The grandfather's only son is the father. The mother is the wife of the father. How many generations are there in this family?
In a family of four members A, B, C, and D, A is a doctor, B is a teacher, C is A's sibling, and D is the parent of A and C. What is the profession of D?