Pointing towards a person in a photograph, Nidhi said, “He is the only son of the father of my sister’s brother.” How is that person is related to Nidhi?
Answer: (3) Nidhi’s brother
Sister’s brother of Nidhi means brother of Nidhi.
Father of of Sister means father of Nidhi.
Therefore, person in a photograph is the brother of Nidhi.
Hence, the answer is (3) Nidhi’s brother.