ChemistryMedium60×since 2002Q669Which one of the following has an optical isomer ? (en = ethylenediamine)A[Zn (en) (NH₃)₂]²⁺B[Co (en)₃]³⁺C[Co (H₂O)₄ en]³⁺D[Zn (en)₂]²⁺Check answerSkip