Explanation:

- M and Q are not at the ends. So, they are seated somewhere in the middle.

- K is in the middle position, so he is the fourth person from either end.

- P sits between Q and N. This means Q, P, N (or N, P, Q) are adjacent.

- L sits third to the right of K. Thus, K has three people to his right.

- Given K is immediately left of O, the sequence for K and O is KO.

- Combining all, we have:

1. K is in exactly the fourth position.

2. KO means O is in the fifth position.

3. L needs to be third to the right of K, so L is in the second position.

4. P sits between Q and N (we’ll find where they fit next).

5. M and Q are in non-extreme positions, meaning M is in the third position and Q in the sixth.

6. Thus, only the first and last position options remain for N and P.

From this, it emerges: L, M, K, O, P, Q, N. Hence, N is at the extreme left.

- Correct Answer: N at the extreme left end.

- Correct Answer: Option 3, N