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From the following flowsheet for the ext...

From the following flowsheet for the extraction of pure metal, answer the given questions.

(iv) Some of the following metals are obtained by electrolysis of their fused salts : `Al, Na, Cu, Ag, Mg, Ca`. These metals are :

A

`Cu, Ag`

B

`Al, Na, Cu`

C

`Ag, Mg,Ca`

D

`Al,Na,Mg,Ca`

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The correct Answer is:
D
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