Which reaction involves a redox process where the oxidizing agent gains electrons without oxygen loss?

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2Na + Br₂ → 2NaBr Correct Fe₂O₃ + 3CO → 2Fe + 3CO₂ MnO₂ + 4HCl → MnCl₂ + Cl₂ + 2H₂O PbO + C → Pb + CO

In 2Na + Br₂ → 2NaBr, Br₂ (Br: 0 to -1) gains electrons, oxidizing Na (0 to +1), no oxygen involved.

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