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FeCr(2)O(4)( chromite ) is converted to ...

`FeCr_(2)O_(4)(` chromite `)` is converted to `Cr` by following steps `:`
Chromite `overset(I)rarrNa_(2)CrO_(4)overset(II)rarrCr_(2)O_(3)overset(III)rarr Cr`
Reagents in `I,II,` and `III` step might be `:`

A

`Na_(2)CO_(3)//"air",triangle" "C "C`

B

`Na_(2)CO_(3)//"air",triangle" "C, triangle" "Al, triangle`

C

`NaOH//"air",triangle" "C,triangle" "Ag,triangle`

D

`NaOH//triangle" "Al//triangle" "C,triangle`

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The correct Answer is:
B
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