Directions: Each of the following items in this section consists of a sentence, 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 (a), (b), (c) and (d). You are required to re-arrange the jumbled parts of the sentence and mark your response accordingly.

has become (P) / ever since the COVID-19 pandemic began, (Q) / a fixture of everyday life (R) / calibrating disease-related risk (S)