Below point 'A' `FeO` can __________
(a)be reduced by carbon monoxide only.
(b)Be reduced by both carbon monoxide and carbon.
(c)be reduced by carbon only
(d)not be reduced by both carbon and carbon monoxide

Options

A. be reduced by carbon monoxdie only
B. be reduced by both carbon monoxide and carbon
C. be reduced by carbon only
D. not be reduced by both carbon and carbon monoxide