Which of the following statements is not true about the complex ion [CrCl(NO2)(en)2]+ ?
(1) It has two geometrical isomers *cis* and *trans*
(2) *cis* and *trans* forms are not diastereomers to each other
(3) Only the *cis* isomer displays optical activity
(4) It has three optically active isomers: *d*, *l* and *trans* forms