L, M, N, O, P, Q and R, are sitting in a straight row, facing north. Only three people sit between Q and N. M and O are immediate neighbours. O is at the extreme right end of the row. R is at the immediate left of N. Who is at the fifth position from the left end of the row?

Seven people: L, M, N, O, P, Q, and R are sitting in a straight row, facing north.
Only three people sit between Q and N.
M and O are immediate neighbours.
O is at the extreme right end of the row.
R is at the immediate left of N.

​From the given information arrangement will be:

The remaining positions (2 and 3) are for L and P, and their arrangement can be interchanged based on the question.

The person at the fifth position from the left is: N

Thus, correct answer is (b)