Explanation:

- We have six people: E, H, K, M, S, and U sitting in a circle facing the center.

- U and H are immediate neighbors of M. This means the arrangement could be U, M, H or H, M, U.

- E is sitting between K and S. So, the sequence is K, E, S or S, E, K.

- H is immediately to the right of S, which implies the order S, H.

- To fit all conditions, the seating arrangement becomes: K, E, S, H, M, U.

- Now, check who is to the immediate right of U: it is K.

Therefore, the correct answer is:

3. K