Seating Arrangements

Concept:We need to arrange eight persons in a row facing north and identify which pair sits at the extreme ends.Explanation:Let the positions be 1 (leftmost) to 8 (rightmost).From "P is fourth to the right of T": $T$ at $x$ ⇒ $P$ at $x+4$.From "W is fourth to the left of S": $W$ at $y$ ⇒ $S$ at $y+4$.W is next to the left of P: $W = P-1$.P is neighbour of Q: $Q = P+1$ (since $W$ is already at $P-1$).Thus consecutive block: $W$ at $p-1$, $P$ at $p$, $Q$ at $p+1$.R is neighbour of Q and not at ends ⇒ $R = Q+1 = p+2$ (since $P$ is $Q$'s left neighbour).U is neighbour of T and not at ends ⇒ $U$ is either $T-1$ or $T+1$.Using $P = T+4$ and $S = W+4$, all 8 positions are covered from $T$ to $S$.Possible $p$ must satisfy $p-4 \ge 1$ and $p+3 \le 8$ ⇒ $p=5$ only.Thus positions:1: T, 2: ?, 3: ?, 4: W, 5: P, 6: Q, 7: R, 8: S.Remaining U and V go to positions 2 and 3. Since U is neighbour of T, U must be at 2, hence V at 3.Final arrangement: 1-T, 2-U, 3-V, 4-W, 5-P, 6-Q, 7-R, 8-S.Extreme ends are T (position 1) and S (position 8).None of the given option pairs (P,Q), (Q,R), (T,V) match T and S.Answer: