State which of the following given collection are sets :
collection of four months of year having 31 days.

State which of the following given collection are sets : collection of fat students of your school.

which of the following collection is a set ?

State which of the following given collection are sets : collection of all good schools of Kolkata.

Which of the following collections is a set

Which of the following collection is not a set?

which of the following collection is not a set ?

Which of the following collections are sets? All fictions movies

State which of the following given collection are sets : collection of five most beautiful girls of your school.

State which of the following given collection are sets : collection of all consonants of English alphabet.

State which of the following given collection are sets : collection of interesting books in your school library.