Which of the following are sets? Justify your answer.
Set of all novels written by English writer R.K. Narayan.

Which of the following are sets ? Justify your answer. A collection of novels written by the writer Munshi Prem Chand.

Which of the following are sets ? Justify your answer. The collection of all even integers.

Which of the following are sets ? Justify your answer. The collection of all boys in your class.

Which of the following is the empty set

Which of the following is an empty set?

Which of the following are sets ? Justify your answer. The collection of questions in this Chapter.

Which of the following are sets ? Justify your answer. A team of eleven best-cricket batsmen of the world.

Which of the following are sets ? Justify your answer. The collection of ten most talented writers of India.

Which of the following are sets ? Justify your answer. The collection of all natural numbers less than 100.