Which of the following are sets? Justify your answer.

A collection of novels written by the writer Munshi Prem Chand.

A collection of novels written by the writer Munshi Prem Chand is a well-defined collection because there are finite numbers of books which Munshi Prem Chand has written. The names of the book could not vary from person to person on the basis of personal choice. The well-defined objects of the collection make it a set.

Hence, this collection is a set.