Four of the following five are alike in a certain way based on a group, find the one that does not belong to that group?

Study the following information carefully and answer the questions given below: Eight persons
i.e., L, M, N, O, P, Q, R and S are sitting in a linear row. Some of them are facing the North and some are facing the south direction. No two persons sitting together face in the same direction. All the information is not necessarily in the same order. L sits third to the right of Q. N sits second to the left of
L. P is an immediate neighbor of Q. One person sits between P and R. S sits fourth to the left of O. M faces in North direction. Number of persons sit to the right of R is same as the persons sitting to the right of
M. O doesn’t sit at the extreme end.