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 ?
Option:
A. M
B. N
C. P
D. Q
E. R
Answer: A . M
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Justification:
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.
