Match each of the set on the left in the roster form with the same set on the right described in set-builder form:

(i) {1, 2, 3, 6} (a) {x : x is a prime number and a divisor of 6}

(ii) {2, 3}  (b) {x : x is an odd natural number less than 10}

(iii) {M,A,T,H,E,I,C,S  (c) {x : x is natural number and divisor of 6}

(iv) {1, 3, 5, 7, 9}  (d) {x : x is a letter of the word MATHEMATICS}.