Rearrange P, Q, R, S to form a coherent sentence: P: was formed in 1870 to give voice to the demands / Q: in western India, the Sarvajanik Sabha / R: and all classes of people were its members / S: and needs of the people

Reading the parts: 'in western India, the Sarvajanik Sabha (Q) was formed in 1870 to give voice to the demands (P) and needs of the people (S) and all classes of people were its members (R).' This forms a coherent sentence about the Sarvajanik Sabha's formation, purpose, and membership. Q introduces the subject, P gives the formation and purpose, S completes 'demands and needs of the people', and R adds the membership detail. Hence the correct order is Q P S R, option (c).