The formula of dichlorido bis (urea) copper (II) is ?
(A) [Cu (O=C(NH2)2)Cl2]
(B) [CuCl2(O=C(NH2)2)2]
(C) [Cu (O=C(NH2)2)Cl]Cl
(D) [CuCl2(O=C(NH2)2H2]
