A sales representative plans to visit each of six companies M, N, P, Q, R and S exactly once during the course of one day. She is setting up her schedule for the day according to the following conditions : (i). She must visit M before N and R. (ii). She must visit N before Q. (iii). The third company she visits must be P.
If the sales representative visits S first, which company must she visit second ?
Answer: A. M
Of the six companies if S is first, P is third and the orders M N Q and M R are followed. Clearly, M must be visited second.