In each of the items 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 correct sequence and mark in your Answer Sheet accordingly.

Boys are on their parents invariably dependent until they can earn money to support themselves

P: Boys are · Q: on their parents · R: invariably dependent · S: until they can earn money to support themselves