Which of the following will give inner o...

Which of the following will give inner orbital octahedral complex -

`d^(7)`

`d^(8)`

`d^(6)`

all the given

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Atomic number of Mn, Fe and Co are 25, 26 and 27 respectively. Which of the following inner orbital octahedral complex ions are diamagnetic -

`[Co(NH_(3))_(6)]^(3+)`

`[Mn(CN)_(6)]^(4-)`

`[Fe(CN)_(6)]^(4-)`

`[Fe(CN)_(6)]^(3-)`

`[MnCl_(6)]^(3-)`

`[FeF_(6)]^(3-)`

`[CoF]^(3-)`

`[Ni(NH_(3))_(6)]^(2+)`

`[Co(NH_(3))_(6)]^(3+)`

`[Mn(CN)_(6)]^(3-)`

`[Ni(NH_(3))_(6)]^(2+)`

`[FeF_(6)]^(3-)`