The pair of metal ions that can give a spin only magnetic moment of 3.9 BM for the complex [M(H2O)6]Cl2, is -

Question

The pair of metal ions that can give a spin only magnetic moment of 3.9 BM for the complex [M(H₂O)₆]Cl₂, is -

V²⁺ and Fe²⁺

V²⁺ and Co²⁺

Co²⁺ and Fe²⁺

Cr²⁺ and Mn²⁺

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