Directions: Each of the following items in this section consists of a sentence(s), the parts of which have been jumbled. These parts have been labelled as P, Q, R and S. given below each sentence are four sequences namely (1), (2), (3) and (4). You are required to rearrange the jumbled parts of the sentence and mark your response accordingly.

P: several years ago

Q: course on climate change at Texas A & M University

R: Professor Andrew Dessler created an introductory

S: for freshmen and sophomores