A sales representative plans to visit each of the 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:
1) She must visit M before N and R.
2) She must visit N before Q.
3) The third company she visit must be P.
Which of the following could be the order in which the sales representstive visit the six companies ?

Options

A. M, S, P, N, R, Q
B. Q, N, P, R, S, M
C. M, R, N, O, P, S
D. P, R, M, N,Q, S

Answer

A

Explanation

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