Ruby introduced Rohit as the son of the daughter of the father of her uncle. Rohit is Ruby's?
Answer & explanation
Correct answer: option 1
The correct answer is Option (1) → Brother
A chain of relations is read from the end that is closest to the speaker, one link at a time. Ruby says Rohit is “the son of the daughter of the father of her uncle”:
The father of her uncle is Ruby’s grandfather (her uncle is her parent’s brother, so his father is her parent’s father).
The daughter of her grandfather is a daughter of that family: Ruby’s mother (when the uncle is her mother’s brother).
The son of her mother is Ruby’s brother.

The grandfather’s daughter could also be Ruby’s aunt, which would make Rohit her cousin; cousin is not among the options, and of the four relations given only Brother fits the chain.