Rearrange P, Q, R, S to form a coherent sentence: P: and the vision to carry out a full-scale revolution / Q: part in revolts against taxes and food / R: scarcity but they lacked the means, programmes / S: during British rule peasants often took

Reading the parts: 'during British rule peasants often took (S) part in revolts against taxes and food (Q) scarcity but they lacked the means, programmes (R) and the vision to carry out a full-scale revolution (P).' This forms a coherent historical statement. S introduces the subject and verb, Q completes 'part in revolts against taxes and food', R follows with 'scarcity but they lacked the means, programmes', and P concludes with 'and the vision to carry out a full-scale revolution'. Hence the correct order is S Q R P, option (a).