reduction processes among the given is/are
i. Fe₂O₃ + 3C → 2Fe + 3CO
ii. Cu₂O + C → 2Cu+ CO
iii. PbO + C → Pb + CO
iv. ZnO + C → Zn+ CO
 

• A

  (i)

• B

  (ii)

• C

  (iii)

• D

  (iv)