(Q7).Which of the following sets are equal?

(i) A = {x : x is a letter in the word FOLLOW}

Elements in set A are {, , , }

(ii) B = {x : x is a letter in the word FLOW}

Elements in set B are {, , , }

(iii) C = {x : x is a letter in the word WOLF}

Elements in set C are {, , , } Sets A, B and C have elements, Hence, they are sets.