Six friends are sitting in a circle and are facing the centre of the circle.…

In a circular seating arrangement where everyone faces the centre, the clockwise and anticlockwise directions are reversed relative to each person's own left and right — a person's immediate right neighbour is the one seated anticlockwise from them (as viewed from above), while their immediate left neighbour is the one seated clockwise from them.

1. Since Prakash and Mukesh sit directly opposite each other in a group of six, they occupy seats exactly three places apart around the circle.

2. "Pankaj is sitting to the immediate right of Mukesh" fixes Pankaj's seat: by the facing-centre rule, Pankaj occupies the seat immediately anticlockwise of Mukesh.

3. "Deepa is between Prakash and Pankaj" then fixes Deepa in the one remaining seat adjacent to both Prakash and Pankaj, giving the clockwise order Prakash - Deepa - Pankaj - Mukesh.

4. The two seats left, going the other way round between Mukesh and Prakash, are for Priti and Lalit. "Priti is between Mukesh and Lalit" places Priti next to Mukesh and Lalit next to Prakash, completing the clockwise order: Prakash, Deepa, Pankaj, Mukesh, Priti, Lalit, and back to Prakash.

5. Applying the facing-centre rule to Prakash: his anticlockwise neighbour, i.e. the seat immediately before him in this clockwise listing, is Lalit — so Lalit is seated to Prakash's immediate right.

Cross-check: the same rule applied to Mukesh and Pankaj reproduces the given clue directly (Pankaj is immediately anticlockwise of Mukesh, i.e. to his immediate right); Deepa, immediately clockwise from Prakash, correctly sits on Prakash's immediate left; and Prakash and Mukesh remain exactly three seats apart, confirming they are opposite each other — all matching the diagram below.

Hence, Lalit is sitting to the immediate right of Prakash.