Pointing to a man, Roshani said that his wife is the only daughter-in-law of my father-in-law Mohan. How is the man related to Mohan?

The correct answer is: Son.

Roshani’s father-in-law is Mohan. Roshani’s wife is the only daughter-in-law of Mohan. This means that Roshani’s wife is Mohan’s daughter-in-law. The man is Roshani’s wife’s husband. Therefore, the man is Mohan’s son.

Here is a brief explanation of each option:

• Son: The man is Roshani’s wife’s husband. Therefore, the man is Mohan’s son.
• Uncle: The man is not Mohan’s uncle. Mohan’s son is the man’s father.
• Father: The man is not Mohan’s father. Mohan is the man’s father-in-law.
• Brother: The man is not Mohan’s brother. Mohan is the man’s father-in-law.