Is not the d option also correct?

Note TS marks. Attempt all the questions. 1. Let S[(a, b) : a, b e R such that a # 0} Let be binary defined on S as (a, b) (c, d) = (ac, bc +d. Then (B) (S, *) forms non abelian group. (A) (S, ) forms an abelian group. (S, ) is cyclic group (D) (S, ) does not form group. (C) lat G = 7 U {0} then G under us