Ordering of Sentences - Verbal and Reasoning

Directions to SolveIn questions below, each passage consist of six sentences. The first and sixth sentence are given in the begining. The middle four sentences in each have been removed and jumbled up. These are labelled as P, Q, R and S. Find out the proper order for the four sentences.
Q1:

S1: What are the causes of our chronic food shortage ?
P : To find for these growing new millions is desperate task.
Q : every year, we add more than a crore of persons to our population.
R : Despite stupendous efforts by our government, the population is growing unabated.
S : The chief cause is the population explosion.
S6: This unprecedented growth can drag us to the doors of starvation very soon.
The Proper sequence should be:

A QRSP

B SQPR

C QPRS

D PSQR

ANS:B - SQPR

No answer description is available.