An aromatic compound \( \mathrm{A} \) having molecular formula \( \mathrm{C}_{7} \mathrm{H}_{6} \mathrm{O}_{2} \) on treating with aqueous ammonia and heating forms compound \( \mathrm{B} \) . the compound \( \mathrm{B} \) on reaction with molecular bromine and potassium hydroxide provides compound \( \mathrm{C} \) having molecular formula \( \mathrm{C}_{6} \mathrm{H}_{7} \mathrm{~N} \). The structure of \( \mathrm{A} \) is:
(a)
(b)
(c)
(d)
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