Passage

Five cities P, Q, R, S, and T are connected by different modes of transport as follows:

P and Q are connected by boat as well as rail.
S and R are connected by bus and boat.
Q and T are connected by air only.
P and R are connected by boat only.
T and R are connected by rail and bus.

QUESTION

CSAT

Easy

Reasoning

Prelims 2013

If a person visits each of the places starting from P and gets back to P, which of the following places must he visit twice?

Select an option to attempt

Explanation

The key here is that the person is starting from P and visiting all cities, returning to P.

From P, the person can go to Q (by boat or rail). From Q, the person can go to T (by air only). From T, the person can go to R (by rail or bus). From R, the person can go to S (by bus or boat). Finally, to return to P from S, the person must travel to R first (by bus or boat), and then travel from R to P (by boat). Thus, the person must visit R twice: once when traveling from T to R, and once when returning to P from R.

The correct answer is B. R.