Which one of the following pairs of cities is connected by any of the routes directly without going to any other city ?
aP and T
bT and S
cQ and R
dNone of these
AnswerUPSC’s answer is (d).
The direct links are P-Q, P-R, Q-T, T-R and R-S, and nothing else. Check each pair: P and T have no direct link (they connect only through Q or R); T and S have none, since S links only to R; Q and R have none, since they connect only through P or T. No listed pair is joined directly, so the answer is none of these.
Why each option is right or wrong
(a) Wrong. P to T needs a stop at Q or R.
(b) Wrong. S is linked only to R.
(c) Wrong. Q to R needs a stop at P or T.
(d) Right. None of the listed pairs has a direct route.
Answer: UPSC’s key. Explanation: written by UPSC Grade, not by UPSC.
