Study the following information carefully and answer the questions given below it.
Nine friends L, M, N, O, P, Q, R, S and I are sitting in a circle facing the centre. T sits fifth to the right to R. N is not an immediate neighbour of either R or T. M sits between S and P. N sits fourth to the left of P. O sits second to the right of Q. S is not an immediate neighbour of T.
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 does not belong to the group?