The lowest degree of paramagnetism per m...

The lowest degree of paramagnetism per mol of the compound in the following will be shown by :

A

`MnSO_4cdot4H_2O`

B

`ZnSO_4cdot7H_2O`

C

`FeSO_4cdot7H_2O`

D

`NiSO_4cdot6H_2O`

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The correct Answer is:

B

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