Given below are four jumbled sentences. Out of the given options select the one that gives their correct order.

A. Their classmate, Koushal, hardly studied and spent much of his time wasting on prattles.
B. He made himself busy by collecting old pens and used papers in order to avoid studies.
C. Poonam, the class teacher, was very much loved and respected by her students.
D. Three of them were very intelligent and spent most of their time studying with Poonam.