Question

K, L, M, N, O, P, S are seven friends siting in a row

facing north. L sits to the immediate right of K. K sits fourth to the right of M. N is an immediate neighbour of both P and S. The one who sits fourth to the left of S, sits at one of the extreme ends of the row. Who sits fourth from the right end of the row?

A k

B N

C p

D S