Directions: In the following items each passage consists of six sentences. The first and the sixth sentence are given in the beginning. The middle four sentences in each have been removed and jumbled up. There are labeled P, Q, R and S. You are required to find out of the proper sequence of the four sentences.

S₁ : Have you ever thought of the e ways in which birds are useful to man. S₆ : Finally, birds and their eggs from an important part of man's food. P : Again, there are some birds that help us to keep our surroundings clean by removing dead animals and decaying matter. Q : A bird eats hundreds of insects every day, and thus helps to limit the insect population of the words. R : Their service to man is to check the growth of insects. S : Another service done by birds to man is to kill animals like rats and squirrels which destroy the farmers' crops.