Amir told Shahrukh, “Yesterday I defeated the only brother of the daughter of my grandmother.” Whom did Amir defeat?
Answer & explanation
Correct answer: option 3
The correct answer is Option (3) → Father
Read the relation from Amir's side, one link at a time:
“My grandmother”, on the father's side, is the mother of Amir's father.
“The daughter of my grandmother” is then Amir's father's sister, Amir's aunt.
“The only brother” of that aunt is the grandmother's only son, that is, Amir's father.

On the mother's side, the same words would lead to the maternal uncle, who is not among the options.