In this section, each item consists of six sentences of a passage. The first and sixth sentences are given as SI and S6. The middle four sentences in each have been jumbled up and labelled as P, Q, R and S. You are required to find the proper sequence of the four sentences and mark your response accordingly.

S1: Manure is utterly useful.

P:  Manure is an organic substance obtained from the decomposition of plant or animal wastes. 

Q: The decomposed matter is used as organic manure

R: The decomposition is caused by some microorganisms.

S: Farmers dump plant and animal waste in pits in open places and allow it to decompose.

S6 This organic manure can be used for various plants.