Some parts of the sentence given below have been jumbled up. You are required to re-arrange these parts which are labelled P, Q, R and S to produce the correct sentence. Choose the proper sequence from the options.
(P)the nun who was the Principal (Q)
called an assembly (R)
of my grand daughter's school (S)
to announce the result of a fund-raising drive
Which one of the following is the correct sequence?