Seven people K, L, M, N, O, P and Q, are sitting in a straight row, facing the north. Only four people sit to the left of P. Q sits third to the left of N. N is not an immediate neighbour of P. M sits third to the left of L. K sits to the immediate left of M. Who sits at the extreme left end of the row?

A

K

B

M

C

O

D

Q