In the following question, there are six sentences marked S1, S6, P, Q, R, and S. The positions of S1 and S6 are fixed. You are required to choose one of the four alternatives which would be the most logical sequence of the sentence in the passage.

S1. Did you know that even Indians need to obtain a permit to visit certain places in India?

P. This is done so that the movement of people are regulated.

Q. This permit is called as the Inner Line Permit.

R. Such permits are needed to visit sensitive places near the international border.

S. And the Trible cultures are protected and unsavoury incidents are minimised.

S6. So, the next time you visit any of the sensitive places, remember to obtain the Inner Line Permit.