Seven people, I, J, K, L, O, P and Q are sitting in a row, facing north. No one sits to the right of I. Only three people sit between I and J. Only two people sit between J and Q. L sits third to the left of P. K sits to the immediate right of P. How many people sit between O and Q?​

Given: Seven people, I, J, K, L, O, P, and Q, are sitting in a row, facing north.

No one sits to the right of I.

Only three people sit between I and J.

Only two people sit between J and Q.

L sits third to the left of P.

K sits to the immediate right of P.

There are three people who sit between O and Q.

Thus, the correct option is (a).