Check whether the following is a set? Justify your answer.
The collection of all even integers

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

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

Which of the following are sets? Justify your answer. The collection of all the months of a year beginning with the letter J

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

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

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

Match the following.Justify your answer

Which of the following are sets? Justify your answer. A collection of most dangerous Animals of the world