Introducing Kamla, Mahesh said, “Her father is the only son of my father” How was Mehesh related to Kamla ?

Start with the statement. "Her father" is Kamla's father. Mahesh describes him as "the only son of my father", so this man is the one and only son of Mahesh's father. Mahesh is the speaker, so if he is that only son, then Kamla's father is Mahesh himself.

This is a standard blood-relation problem. The key is to identify the person who links the two relations, here the only son of Mahesh's father, and then check who that person is in relation to Kamla.

• A) Brother: This would need Kamla's father to be a different person from Mahesh, which contradicts the "only son" link.
• C) Uncle: An uncle is a sibling of a parent. Kamla's father is the only son of Mahesh's father, so he is not Mahesh's sibling's child in this chain.
• D) Son: If Mahesh were Kamla's son, Kamla's father would be Mahesh's grandfather's son, which breaks the stated link.

Such questions test the same logical discipline needed for the reasoning and analytical parts of the exam. Trap: aspirants read "only son" and start hunting for a brother or a cousin, forgetting that the same person must satisfy both "her father" and "only son of my father".