(A)x2+y2+4x−21=0andx2+y2−12x+11=0(B)x2+y2−4x+21=0andx2+y2+12x−11=0(C)x2+y2−4x−21=0andx2+y2−12x−11=0(D)x2+y2+4x+21=0andx2+y2+12x+11=0