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Which of the following statement(s) is/a...

Which of the following statement(s) is/are incorrect?

A

Magnesium may by extracted by self reduction method

B

Down's Cell process is used to extract magnesium from sea water

C

Magnalium is an alloy of magnesium

D

Formula of Epsom salt in `MgSO_(4)*6H_(2)O`

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A, B, D
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