The Kjeldahl method of Nitrogen estimation fails for which of the following reaction products?

Nitro benzene on reduction with Sn + HCl gives Aniline. Nitrogen is attached to carbon and hydrogen. Nitrogen can be estimated by using kjeldahl’s methodIn a compound Nitrogen attached to both carbon and hydrogen, nitrogen can be estimated by Kjeldahl’s method.C) Benzyl cyanide on reduction with Sn+HCl and followed by hydrolysis gives aldehyde.Resultant compound no nitrogen temperature gives diazonium in this reaction final product is phenol no nitrogen in the resultant compound.