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Q 2555534464.     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.
Which mode of transport would help one to reach R starting from Q but without changing the mode of transport ?
(Provided By a Student and Checked/Corrected by EXXAMM.com Team)