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.
Which of the following could be the order in which the sales representative visits the six companies ?

Answer: A. M, S, P, N, R, Q

According to information, P must be in third place and the order M, N and Q must not be violated. This is followed only in the arrangement M S P N R Q.