Indicate the complex ion which shows geometrical isomerism.
(i) [Cr(H2O)4Cl2]+
(ii) [Pt(NH3)3 Cl]
(iii) [Co(NH3)6]3+
(iv) [Co(CN)5(NC)]3–
Option (i) [Cr(H2O)4Cl2]+ is the answer.
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