Let's break down the family relationships step-by-step to find the connection between A and C.
Me and my spouse have a big family, comprising 8 females and 6 males. We have two sons and two daughters, of whom the eldest is unmarried. Out of my two grandsons and three granddaughters, only one grandson is a single child. His mother is my younger daughter.
Which of my children necessarily has two daughters?
M has a son Q and a daughter R. He has no other children. E is the mother of P and daughter-in- law of M. How is P related to M?