Step-by-step explanation:

If,

A = {3, 5, 7, 9}

B = {2, 4, 6, 8, 10}

C = {12, 14, 18, 20, 24}

D = {21, 26, 31, 36}

Which of the following are sets? Justify your answer.

(a) The collection of all the days in a week beginning with the letter ‘T’.

(b) The collection of all difficult questions in the chapter on sets.

(c) The collection of girls in your class.

(d) The collection of all rivers in India.

(e) The collection of all active teachers in the school.

(f) The collection of all integers more than -3.

(g) The collection of all beautiful flowers in the park.

am I right if not pls correct me