List of top Logical Reasoning Questions on Blood Relations asked in SLAT

Samantha tells her friend that her two aunties' children are coming for dinner. One aunt has two children, Mark and Robbin, and the other aunt has one son, Pat. How is Pat related to Samantha’s father?
Pointing to a picture, Sihiti says, ``He is the son of the only son of my son of my grandfather.'' What relation exists between Sihiti and the person in the picture?