Five boys are sitting in a row. Kajol is sitting in between Piyush and Paresh while Gogol is sitting in between Ronnie and Piyush. Who is sitting at the extreme right of Gogol?

Let's analyze the relative positions of the five boys based on the conditions provided:
1. Kajol is between Piyush and Paresh. This yields two possible spatial subsets: $\text{Paresh – Kajol – Piyush}$ or $\text{Piyush – Kajol – Paresh}$.
2. Gogol is between Ronnie and Piyush. This also yields two possible configurations: $\text{Ronnie – Gogol – Piyush}$ or $\text{Piyush – Gogol – Ronnie}$.

By combining these links to form a continuous linear row of 5 people, we find two valid configurations:

* Arrangement 1: $\text{Ronnie – Gogol – Piyush – Kajol – Paresh}$
* Arrangement 2: $\text{Paresh – Kajol – Piyush – Gogol – Ronnie}$

The question asks for the person sitting at the extreme right end of the entire row relative to Gogol's position. In Arrangement 1, Paresh sits at the extreme right end. In Arrangement 2, Ronnie sits at the extreme right end. Therefore, the person at the extreme right can be either Paresh (Option 2) or Ronnie (Option 3).