[CoCl2(NH3)4]++Cl−⟶[CoCl3(NH3)3]+NH3 . If in this reaction two isomers of the product are obtained, which is true for the initial (reactant) complex :
a. compound is in *cis*-form
b. compound is in *trans*-form
c. compound is in both (*cis* and *trans*) form
d. can't be predicted