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B
CuSO4.7H2O
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C
CuSO4.17H2O
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D
CaSO4.7H2O
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Solution
The correct option is AMgSO4.7H2O Epsom salt is a magnesium sulphate hydrate. Molecular formula of epsom is MgSO4.7H2O. It is used for various purposes like body scrub, fertilizer, house cleaning etc.