Directions: This question 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. 

a study of Anglo-Saxon literature (P) / begun by Bernard Pitt in 1914 (Q) / Pitt was killed in the First World War (R) / was completed by a colleague after (S)