The left column represents each set in roster form and right column represents each set in set-builder form.
(i)
{ 1,2,3,6 } shows the set of elements divisible by 6 .So, (i) matches with (c).
(ii)
{ 2,3 } shows the set of elements which are prime numbers as well as divisible by 6 .
So, (ii) matches with (a).
(iii)
{ M,A,T,H,E,I,C,S } shows the set of different letters of the word MATHEMATICS.
So, (iii) matches with (d).
(iv)
{ 1,3,5,7,9 } shows the set of old natural numbers less than 10 .
So, (iv) matches with (b).