Explanation:

- Kapil is the nephew of Rajat. This means that Kapil is the son of Rajat's sibling.

- Nisha is the mother of Rajat. Therefore, Nisha is the grandmother of Kapil.

- Ramesh has only two children: Rajat and Neelesh. Since Kapil is the nephew of Rajat, Kapil must be the son of Neelesh.

Given this information:

- Option 1: Father - Kapil cannot be the father of Neelesh as Neelesh is Kapil's parent.

- Option 2: Brother - They are not siblings.

- Option 3: Nephew - Kapil is the nephew of Rajat, not Neelesh.

- Option 4: Uncle - This is incorrect as Neelesh is Kapil's father.

The correct relationship is not explicitly listed. The best fitting term from the options might be misleading. The ? correct answer in the given context and options is Brother ?, although not applicable directly, if treating Rajat and Neelesh as siblings; however, this situation is usually misrepresented in puzzles. Hence, none strictly applies; however, logically adjusted, we get this as closest. .