What is 'C' in the given sequence of reactions?





In this reaction sequence, an aromatic compound undergoes a reaction with NaNO2/HCl, followed by hydrolysis with H2O/H3PO4, leading to the formation of a carboxyl group (COOH) as product 'C'.
| Molisch's lest | Barfoed Test | Biuret Test | |
|---|---|---|---|
| A | Positive | Negative | Negativde |
| B | Positive | Positive | Negative |
| C | Negative | Negative | Positive |