Anitrogen-containing compound shows no absorption band at ∼3400cm−1 and no absorption bands between ∼1700cm−1 and ∼1600cm−1. what class of compound is it

By the given information the nitrogen containing compound belongs to the class of tertiary amine. Absorption band is a range of energies and frequencies in the electromagnetic spectrum. Amine is nothing but a ammonia compound that involves an organic element as a replacement for one or more H atoms.

The answer is b on plato.