The correct sequential addition of reagents in the preparation of 3-nitrobenzoic acid from benzene is :

Question

Br₂/AlBr₃, HNO₃/H₂SO₄, Mg/ether, CO₂, H₃O⁺

Br₂/AlBr³, NaCN, H₃O⁺, HNO₃/H₂SO₄

Br₂/AlBr₃, HNO₃/H₂SO₄, NaCN, H₃O⁺

HNO₃/H₂SO₄, Br₂/AlBr₃, Mg/ether, CO₂, H₃O⁺

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