Which of the following substances cannot be a | vedclass

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(C) The Kjeldahl method is used for the estimation of nitrogen in organic compounds. However,it is not applicable to compounds containing nitrogen in

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$DNA$ and $RNA$

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(C) The Kjeldahl method is used for the estimation of nitrogen in organic compounds. However,it is not applicable to compounds containing nitrogen in nitro groups $(-NO_2)$,azo groups $(-N=N-)$,or nitrogen present in the ring (e.g.,pyridine,quinoline,or nitrogen in nucleic acids like $DNA$ and $RNA$).In $DNA$ and $RNA$,nitrogen is present in the heterocyclic rings of the nitrogenous bases (purines and pyrimidines). Therefore,the Kjeldahl method cannot be used for their analysis.

Which of the following substances cannot be analyzed using the Kjeldahl method for the estimation of nitrogen?

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