L, K, A, M, S, T and Q are sitting in a row facing north. T is...

According to the given information: $L, K, A, M, S, T$, and $Q$ are sitting in a row facing north. - T is the immediate right of S. - $S$ is fourth to the right of $Q$.
- Q and L are both at extreme ends.
- K sits immediate right of Q. A sits second to the right of Q.
- So, the only position left for ($\mathrm{M}$) is in the middle.
Hence, the correct answer is " $M$ ".