What is true about \( \left[\mathrm{MnCl}_{6}\right]^{3-},\left[\ma...

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What is true about \( \left[\mathrm{MnCl}_{6}\right]^{3-},\left[\mathrm{FeF}_{6}\right]^{3-} \) and \( \left[\mathrm{CoF}_{6}\right]^{3-} \) ?
I. Each of these are outer orbital complexes.
II. Each of these have \( s p^{3} d^{2} \) hybridisation.
III. Each of these are paramagnetic.
IV. \( \left[\mathrm{MnCl}_{6}\right]^{3-},\left[\mathrm{FeF}_{6}\right]^{3-} \) and \( \left[\mathrm{CoF}_{6}\right]^{3-} \) have four, five and four unpaired electrons respectively.
Choose the correct statements.
(a) I, II and III
(b) II, III and IV
(c) I, III and IV
(d) All four are true
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