Directions: In this section, each item consists of six sentences of a passage. The first and sixth sentences are given in the beginning as S1 and S6. The middle four sentences in each have been jumbled up and labelled as P, Q, R and S. You are required to find the proper sequence of the four sentences and mark your response accordingly on the answer sheet.

S1: Diseases caused by microorganisms or bacteria, which can transmit from a diseased person to a healthy person are `communicable diseases.’

S6: However, diseases can be prevented by vaccination.

P: Pathogens include fungi, bacteria, viruses, protozoa, parasites, and worms.

Q: It is better to prevent diseases than to treat and cure them by medically treating them after they take place. 

R: These diseases can be transmitted through the air or are spread from person to person by direct contact.

S: In other words, communicable diseases are caused by pathogens that can pass from one person to another.