Tom: Hi Sarah, this is a photo of my family.
Sarah: Oh, nice! Who is this man with the glasses?
Tom: He is my grandfather, my mother's father.
Sarah: And the woman next to him?
Tom: That's my grandmother, his wife.
Yukarıdaki diyaloğa göre, Tom'un annesinin babası kimdir?
A) brother
B) grandfather
C) father