As per the given information,
R sits 3rd to the right of T. R does not sit at an extreme end of the row.

Only three persons sit between P and U. P and T are not adjacent to each other. So, we will eliminate Case II and continue with Case I.
I sits opposite to U.

K sits 4th to the left of I.
J sits opposite to the person who sits immediately right of S.

More than two persons sit between K and M.
N sits 2nd to the left of M.
Thus, Q and L sit in the vacant positions of the rows.

Hence, this is the final arrangement
As per the above arrangement, S sits 2nd to the left of Q.