In the following question, there are six sentences marked S1, S6, P, Q, R, 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. When Weiner was travelling in India, he visited a factory where he saw small frail children sitting on damp ground.

P : And the answer he got was that they were weaving carpets there.

Q : So he asked“, "What are they doing there?"

R : And then he decided to study the problems of child labourers in India.

S : Weiner was shocked at the plight of the child workers.

S6. Recently he has published this book and it is winning him acclaim all over the world.