The reaction (s) which does (do) not occur in the reduction zone in the extraction of iron from haematite ore is (are)
A. `Fe_(2)O_(3) rarr CO rarr 2FeO+CO_(2)`
B. `FeO+CO rarrn Fe +CO_(2)`
C. `Fe_(2)O_(3) + 3C rarr 2Fe + 3CO`
D. `CaO + SiO_(2) rarr CaSiO_(3)`