Directions: In the following items, each passage consists of six sentences. The first sentence (S₁) and the final sentence (S₆) are given in the beginning. The middle four in each have been removed and jumbled up. These are labeled P, Q, R and S. You are required to find out the proper sequence of the four sentences and mark accordingly on the answer sheet.

S₁ : Of men’s earliest inventions we know very little. S₆ : Once man had fire, he was the master of all lower creatures. P : Man used stick and stone long before he dared to meddle with fire. Q : The first was to use a stone to crack a nut. R : The next was the use of a stick to strike an enemy. S : It was only a step further that he made a rude weapon by fastening a stone to the end of a stick. The proper sequence should be