1. Read the following statements and answer the four items that follow: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.Sand 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 themode of transport?