1.

Which of the following has largest number of isomers?

Answer»

`[CO(en)_(2)Cl_(2)]^(+)`
`[Co(NH_(3))_(5)Cl]^(2+)`
`[Ir(PR_(3))_(2)H(CO)]^(2+)`
`[Ru(NH_(3))_(4)Cl_(2)]^(+)`

ANSWER :A


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