I enclose P : and the postage Q : a postal order R : the price of books S : which will cover The Proper sequence should be:

The correct answer is: QSPR

• Q: I enclose a postal order.
• S: which will cover the price of books.
• P: and the postage.
• R: The price of books.

The sentence is about a postal order that is enclosed to cover the price of books. The postal order is mentioned first, followed by the price of books, which is what the postal order is for. The postage is mentioned last, as it is an additional cost that is incurred when sending a postal order.

The other options are incorrect because they do not follow the correct order of the information in the sentence.