Which one of the following complex ions has geometrical isomers :–
(a) [Co(en)3]3+
(b) [Ni(NH3)5Br]+
(c) [Co(NH3)2(en)2]3+
(d) [Cr(NH3)4(en)]3+
Correct option**(c) [Co(NH3)2(en)2]3+**
Explanation:
