In the question given below, the passage consists of six sentences. The first and sixth sentences are given at the beginning. The middle four sentences have been removed and jumbled up. They are labelled as, P, Q, R, and S. Find out the proper order for the four sentences.
S1: What are the causes of our chronic food shortage?
P: To find for these growing new millions is a desperate task.
Q: every year, we add more than a crore of person 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