Correct Answer - Option 1 : M/R
1. The sales representative visits S first.
2. The third company she visits must be P.
3. She must visit M before N.
4. She must visit N before Q.
She visits M before N and N before Q. There are two possibilities here:
Case I: M is the second company visits.
Case II: M is the fourth company she visits.But R is not in the option, hence, she must visit M immediately after S.
Hence, M/R is the second company she visits.