Statement I Sulphate is extimated as `BaSO_(4)`, not as `MgSO_(4)`. Statement II Ionic radius of `Mg^(2+)` is smaller than that of `Ba^(2+)`.

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Statement I Sulphate is extimated as `BaSO_(4)`, not as `MgSO_(4)`. Statement II Ionic radius of ... false. D. Assertion is false but Reason is true.

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