Which one of the following subsets of g, given in thè ábove problem is not a subgroup ofg? () h,={(1l0)} cuce (b) h, ={(a, b) e g :a =1 (e) h, -{(a,b) e g:a is

Which one of the following subsets of G, given in thè ábove problem is not a subgroup ofG? () H,={(1L0)} CUCE (b) H, ={(a, b) e G :a =1 (e) H, -{(a,b) e G:a is rational (d) H, = {(a,b) e G:ais irrational atee ultinlicatianis