In the following sentences, some parts of the sentences have been jumbled up. You are requried to rearrange these parts which are labelled P, Q, R, S to produce the correct sentence. Choose the proper sequence and mark in your answer sheet accordingly
Animals `("are able to measure")/P ("the passing of the seasons")/Q ("changes in day-length")/R ("by recognizing")/S`
The correct sequence should be

Options

A. P Q SR
B. SQ PR
C. PRS Q
D. SR P Q