30. Consider the statements :
0) Theset R={a+ ९/3 : a, be Q} isa field under usual addition and multiplication
(ii) The set S= { 2 4 മാട பி is a division ring
-x 7
(1) The set C = {a+ib:a, ® € ष} of complex numbers is a field under usual addition and
multiplication of complex numbers.
(iv) The set Z, is an integral domain
Then
(A) all statements are true
(B) | only (i), (ii) and (iii) are true
(C) _ only (i) a....
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