Six people, K, L, M, N, O and Z, are sitting in a straight row facing north(but not necessarily in the same order). No one sits to the left of M. Only three people sit between M and K. Only three people sit to the right of O. Z sits to the immediate left of O. N is not an immediate neighbour of O. Who sits at the rightmost end of the line?

No one sits to the left of M.
Only three people sit between M and K.
Only three people sit to the right of O.
Z sits to the immediate left of O.
N is not an immediate neighbour of O.

According to the given information, Seating arrangements will be:

N sits at the rightmost end of the line.

Thus, the correct option is (c) N.