Which L-sugar on oxidation gives an optically | vedclass

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(A) sugar is optically active if its structure lacks a plane of symmetry. Upon oxidation with $HNO_3$,the terminal $-CHO$ and $-CH_2OH$ groups are con

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(A) sugar is optically active if its structure lacks a plane of symmetry. Upon oxidation with $HNO_3$,the terminal $-CHO$ and $-CH_2OH$ groups are converted into $-COOH$ groups,forming a dibasic acid (aldaric acid).$1$. Identify the $L$-sugars: An $L$-sugar has the $-OH$ group on the chiral carbon furthest from the carbonyl group pointing to the left in a Fischer projection.$2$. Analyze the options:- Option $A$: This is $L$-gulose. Oxidation yields glucaric acid,which is optically active.- Option $B$: This is $D$-galactose.- Option $C$: This is $D$-glucose.- Option $D$: This is $L$-galactose. Oxidation yields galactaric acid (mucic acid),which has a plane of symmetry and is optically inactive (meso compound).Therefore,the $L$-sugar that yields an optically active dibasic acid is the one in option $A$.

Which $L$-sugar on oxidation gives an optically active dibasic acid?

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