Correct option is A
Given:
People: J, K, L, M, N, O, S (all facing centre).
Only three people sit between O and J when counted from the left of O.
Only three people sit between K and M when counted from the right of M.
S sits to the immediate right of K.
N is an immediate neighbour of M as well as J.
As per the given information, Circular seating arrangements will be:

As per the diagram, N sits second to the left of L.
Thus, the correct option is (A) N.