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Ashok has written the following reaction...

Ashok has written the following reactions to show how metals can be obtained from their ores.
(P) `2Fe_2 O_3 + 3C rightarrow 4 Fe + 3CO_2`
(Q) `Na_2 O + C rightarrow 2 Na + CO`
(R) `ZnO + C rightarrow Zn + CO`
(S) `CuO + C rightarrow Cu + CO`
Identify the INCORRECT reaction(s) among them.

A

only P

B

only Q

C

only P and R

D

only Q, R or S

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