Among the three compounds shown below,two yie | vedclass

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(B) Warm $HNO_3$ is a strong oxidizing agent that oxidizes both the terminal aldehyde group $(-CHO)$ and the terminal primary alcohol group $(-CH_2OH)

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(B) Warm $HNO_3$ is a strong oxidizing agent that oxidizes both the terminal aldehyde group $(-CHO)$ and the terminal primary alcohol group $(-CH_2OH)$ to carboxylic acid groups $(-COOH)$,forming a dicarboxylic acid (aldaric acid).Compound $a$ is $D$-galactose. Oxidation with $HNO_3$ yields galactaric acid (mucic acid).Compound $c$ is $D$-talose. Oxidation with $HNO_3$ also yields galactaric acid (mucic acid) because $D$-galactose and $D$-talose are epimers at $C-4$,and their oxidation products are identical due to symmetry.Compound $b$ is a deoxy sugar derivative and does not yield the same dicarboxylic acid product.Therefore,the exception is compound $b$.

Among the three compounds shown below,two yield the same product on reaction with warm $HNO_3$. The exception is:

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