Six friends Pawan, Kanta, Rishab, Shubham, Mayank and Vikram are sitting in a circle facing the centre. Pawan is to the immediate left of Vikram. Rishab is 4th to the right of Pawan. Only Mayank sits between Pawan and Rishab. Shubham does not sit adjacent to Vikram. Who sits to the immediate right of Shubham?

Rishab 

Let the positions of the six friends be numbered 1-6:

1. Pawan is to the immediate left of Vikram. Rishab is 4th to the right of Pawan.

⇒ Let Vikram be placed at position 1, then Pawan is at position 2 and Rishab sits 4th to the right of Pawan, thus he sits at position 4.

2. Only Mayank sits between Pawan and Rishab.

⇒ Mayank sits at position 3.

3.  Shubham does not sit adjacent to Vikram.

⇒ Shubham does not sit on position 6, he sits at position 5 and Kanta occupies the remaining position. 

The complete arrangement is:

The seat immediate right of Shubham is occupied by Rishab.