In this question, there is a sentence of which some parts have been jumbled up. You are required to rearrange these parts which are labelled P, Q, R and S to produce the correct sentence. Choose the proper sequence and mark in your Answer Sheet accordingly.

up to the end of the eighteenth century, not only because it was often fatal,(P)    smallpox was a particularly dreaded disease, (Q)   but also because those who recovered (R)   were permanently disfigured (S)

The correct sequence should be

Options