Which of the following are sets?
The Collection of rich people in India.

Which of the following are sets? The Collection of all rivers in India.

Which of the following are sets? The collection of teachers in a school .

Which of the following are sets? The Collection of good Hockey players.

Which of the following are sets? The collection of talented boys in a class.

Which of the following are sets? The Collection of prime numbers upto 100.

Which of the following are sets? The collection of first five square numbers.

Which of the following collections are sets? (i) The collection of honest persons in india (ii) The collection of all prime number between 14 and 50. (iii) The collection of all factor of 24 which are less than 20. (iv) The collection of all the rivers of india.