Explanation:

Let’s break it down step by step:

- Ambika is third to the right of Heena. So in a circle, if Heena is at position 1, Ambika is at position 4.

- Kajal is immediately right of Ambika, so if Ambika is at position 4, Kajal is at position 5.

- Riya is a neighbor of both Heena and Kajal. Riya has to sit between Heena and Kajal, which places her at position 6.

- Mala is not an immediate neighbor of Heena. So, Mala cannot be at positions 2 or 6.

- The only one left is Sanya, who must fit in as required.

Placing the names, the order goes:

1. Heena

2. (Empty, can't be Mala)

3. (Empty)

4. Ambika

5. Kajal

6. Riya

Now, only Mala and Sanya are left for positions 2 and 3. Mala can't be at position 2, so she takes position 3, and Sanya gets position 2.

So, around the table: Heena ? Sanya ? Mala ? Ambika ? Kajal ? Riya

Now, who is second to the right of Riya? Moving right from Riya: (1st to right: Heena, 2nd to right: Sanya). So, the answer is Sanya.

Here’s why:

- Every clue leads the arrangement to line up this way, and Sanya falls second to the right of Riya.

- Option 1 (Sanya) is the correct answer.

The other options just don’t match the clues when you arrange them critically.