Pointing to a photograph, Rohan said, 'He is the only son of my father's only daughter.' How is the person in the photograph related to Rohan?
Show answer & explanation
Correct answer: B
Explanation

Answer: Nephew
Quick breakdown:
'My father's only daughter' = Rohan's sister (since Rohan's father has only one daughter, and that must be Rohan's own sister).
'Her only son' = Rohan's sister's son = Rohan's nephew.
Exam-speed trick for these relation puzzles: Always resolve the sentence from the innermost relation outward:
- Father's daughter → sister
- Sister's son → nephew