The pair in which both the species have the same magnetic moment (spin only) is :

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MnH2O62+ and CrH2O2+

CrH2O62+ and FeH2O62+

CrH2O62+ and CoCl42−

Cr(OH)42− and FeNH362+

answer is B.

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Detailed Solution

CrH2O62+ and FeH2O62+ have same magnetic moment as both Ce2+ and Fe2+ have same number of unpaired electrons.

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