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NEET CHEMISTRYMedium

Which one is not a D-sugar?

A

Option 1 (Structure missing)

B

Option 2 (Structure missing)

C

Option 3 (Structure missing)

D

Option 4 (Structure missing)

Step-by-Step Solution

The D and L relative configuration of carbohydrates is determined by the position of the hydroxyl (OH-OH) group on the highest-numbered chiral carbon (the chiral center farthest from the principal carbonyl group) when drawn in a Fischer projection. If the OH-OH group on this bottom-most chiral carbon is on the right side, it is designated as a D-sugar. If the OH-OH group is on the left side, it is designated as an L-sugar. The correct option would depict a structure where the lowest chiral center has the OH-OH group on the left.

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