Study the following information to answer the given questions.

Eight people – K, L, M, N, O, P, and R are seated in a straight line facing North but not necessarily in the same order, L sits third from the left end of the line, Only three people sit between L and R.

O sits to the immediate left of Q. Only one person sits between M and Q. P sits third to the left of N. L is not an immediate neighbor of K.

Which of the following pairs represents persons seated at the two extreme ends of the line ?