Let z be the set of integers and R be the equivalence relation on ZKZKZ defined by: (a,b.e)R(c.d.f) if and only if a+d=b+c and e=fThen * None of these [(5,2,0)]={(5,2,0)} O (5,2,0)]=[(4,1,0)1 O [(5,2,0))=[(2,2,0)1 O [(5,2,0))=[(2,5,0)]