Seven people, L, M, N, O, P, Q, and R are sitting in a row, facing north. Only two people sit to the left of L. Only three people sit between L and P. M sits second to the right of L. Only two people sit between M and Q. R sits at some place to the right of O but at some place to the left of N. How many people sit to the right of R?

Given: 

Seven people, L, M, N, O, P, Q, and R are sitting in a row, facing north.

Only two people sit to the left of L.

Only three people sit between L and P.

M sits second to the right of L.

Only two people sit between M and Q.

R sits at some place to the right of O but at some place to the left of N.

Three people sit to the right of R.

Thus, correct option is (b).