`FeCr_(2)O_(4)` (chromite ) is converted to Cr by following steps :
Crhormite `overset(I)to NaCrO_(4) overset(II) to Cr_(2)O_(3) overset(III) to Cr`
Reagents in I, II and III step might be :

Options

A. `{:(" ""I-Step","II-Step","III-Step"),(Na_(2)CO_(3)//"air,"Delta," "C," "C):}`
B. `{:(" ""I-Step","II-Step","III-Step"),(NaOH//"air,"Delta," "CDelta," AlDelta):}`
C. `{:(" ""I-Step","II-Step","III-Step"),(Na_(2)CO_(3)//"air,"Delta," "CDelta," "CDelta):}`
D. `{:(" ""I-Step","II-Step","III-Step"),(conc.H_(2)SO_(4)Delta," "NH_(4)ClDelta," "CDelta):}`

Answer

B

Explanation

Chromite `overset(NaOH//"air",Delta) to NaCrO_(4) overset(C,Delta)to Cr_(2)O_(3) overset(Al,Delta) to Cr`