Clues

1. Manoj is the father of Rhea and Suresh.
2. Rhea is the mother of Naina.
3. Suresh is the father of Arjun.

Question

How is Naina related to Arjun?

Answer

Naina is Arjun's cousin.

Solution

1. Rhea and Suresh are siblings because they share father Manoj.
2. Naina is Rhea's daughter and Arjun is Suresh's son.
3. Children of siblings are cousins.