The correct sequential addition of reagents in the preparation of 3-nitrobenzoic acid from benze...

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The correct sequential addition of reagents in the preparation of 3-nitrobenzoic acid from benzene is
(a) \( \mathrm{Br}_{2} / \mathrm{AlBr}_{3}, \mathrm{HNO}_{3} / \mathrm{H}_{2} \mathrm{SO}_{4}, \mathrm{Mg} \) / ether, \( \mathrm{CO}_{2}, \mathrm{H}_{3} \mathrm{O}^{+} \)
(b) \( \mathrm{Br}_{2} / \mathrm{AlBr}_{3}, \mathrm{NaCN}, \mathrm{H}_{3} \mathrm{O}^{+}, \mathrm{HNO}_{3} / \mathrm{H}_{2} \mathrm{SO}_{4} \)
(c) \( \mathrm{Br}_{2} / \mathrm{AlBr}_{3}, \mathrm{HNO}_{3} / \mathrm{H}_{2} \mathrm{SO}_{4}, \mathrm{NaCN}, \mathrm{H}_{3} \mathrm{O}^{+} \)
(d) \( \mathrm{HNO}_{3} / \mathrm{H}_{2} \mathrm{SO}_{4}, \mathrm{Br}_{2} / \mathrm{AlBr}_{3}, \mathrm{Mg} / \) ether, \( \mathrm{CO}_{2}, \mathrm{H}_{3} \mathrm{O}^{+} \)
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