Directions : This question consists of a sentence, parts of which have been jumbled. These parts have been labelled as P, Q, R and S. Given below each sentence are five sequences, namely (1), (2), (3), (4) and (5). You are required to re-arrange the jumbled parts of the sentence and mark your response accordingly.

human health(P)/ pollution adversely impacts(Q)/ especially air and water pollution(R)/ numerous studies indicate(S).