Blood Relations Questions

Introducing a boy, Sia says, "He is the grandson of my father. I have no siblings." How is Sia is related to the boy?

A & B are married couple. X and Y are brothers. X is the brother of A. How is Y related to B?

Rajesh is the father-in-law of Neha, and Akash is the only son of Rajesh. How is Akash related to Neha?

Aryan has a brother named Bishnu. Aryan is the son of Chetan. Dev is Chetan's father. In term of relationship, what is Bishnu of Dev?

Pointing to a lady, Diwakar said, "Her mother's only grandson is my son." How is that lady related to Diwakar?

Introducing a man, a girl says " He is the only son of my mother's mother." How is the man related to the girl ?

Introducing a boy a Ankit said," He is the son of daughter of my grandfather's son". How is that boy related to Ankit?

Looking at a portrait, Advaita said, " Anirudh is the father of my grandmother's daughter's niece. My grandfather had only two kids". How is Anirudh related to Advaita?