Caramel flavor is typically produced by compounds like 3-Hydroxy-2-methylpyran-4-one, 2H-4-Hydroxy-5-methylfuran-3-one, and 3-Hydroxy-2-acetylfuran. These compounds are formed during the heating of sugar. However, p-Amino benzoic acid is not related to caramel flavor production. Hence, the correct answer is option (D).