Chemistry - Carboxylic acid and their Derivatives Question with Solution | TestHub

Here only option D is correct and rest are incorrect as Gluconic acid is a monocarboxylic acid which is formed by the partial oxidation of glucose.
As Gluconic acid can not form cyclic (acetal/hemiacetal) structure and oxidation of glucose with$\mathrm{H}\mathrm{N}{\mathrm{O}}_3$gives Saccharic acid so B and C are also incorrect.