Directions : in the following items in this section consists of a sentence, the parts of which have been jumbled. These parts have been labelled P, Q, R and S. Given below each sentence are four sequences namely (a), (b), (c) and (d). You are required to rearrange the jumbled parts of the sentence and mark your response accordingly.

by which the genetic material of a plant is altered, (P) / pests and enhance its nutritional value (Q) / perhaps to make it more resistant to (R) / genetic modification (GM) is the science (S)