(Qs. 17-20): In each of the following questions, the first and the last part of the sentence are numbered 1 and 6. The remaining parts, labelled P, Q, R and S, are not in their proper order. You have to rearrange these parts in order to make a meaningful sentence.

Then choose the best sequence.
1. A healthy diet is
(P) essential for boosting immunity
(Q) in the face of rising infections
(R) which provides all necessary nutrients
(S) and maintains energy levels
6. throughout the day.