A25- let sl(7) ={( a)e m,():ad- be = 1} and for any prime p, let r(p) = e sla(7)|c= 0(modp), b = 0(modp) " (a) r(p) is a subgroup ofsl2(z), having atleast 2 ele

a25- Let SL(7) ={( a)e M,():ad- be = 1} and for any prime p, let r(p) = E Sla(7)|c= 0(modp), b = 0(modp) " (a) r(p) is a subgroup ofSL2(Z), having atleast 2 elements (b) r(p) is a subgroup of SL2 (Z), having atleast 3 elements (c) r(p) is not a subgroup of SL2 (Z), having atleast 2 elements (d) r(p) is not a subgroup of SL2 (Z), having atleast 3 elements