Directions:- Study the following information carefully to answer the question given below.
Seven friends - L, M, N, O, P, Q and R are sitting in a straight line facing north, not necessarily in the same order. M sits fifth to the right of O. P sits third to the right of L. Both L and P do not sit at the extreme ends of the line. Q and R are immediate neighbours of each other. N sits third to the left of Q.
Four of the following five are alike in a certain way based on their seating positions in the above arrangement and so form a group. Which is the one that does not belong to the group?