Explanation:

Let’s break down the relationships:

- Kapil is the nephew of Rajat.

? So, Kapil's father or mother is Rajat's sibling.

- Nisha is the mother of Rajat.

? Nisha is also mother of Rajat’s sibling(s).

- Ramesh has only two children: Rajat and Neelesh.

? So, Neelesh is Rajat's only sibling.

- Therefore, Kapil, being Rajat's nephew, must be the son of Neelesh.

Now, options:

1. Father – ? Kapil is not the father of Neelesh.

2. Brother – ? Kapil is not Neelesh’s brother.

3. Nephew – Kapil is the nephew of Rajat, NOT Neelesh’s nephew.

4. Uncle – ? Kapil is not the uncle of Neelesh.

Correct answer is: Option 3 – Nephew.