Which one is not a D-sugar?
Option 1 (Structure missing)
Option 2 (Structure missing)
Option 3 (Structure missing)
Option 4 (Structure missing)
The D and L relative configuration of carbohydrates is determined by the position of the hydroxyl () group on the highest-numbered chiral carbon (the chiral center farthest from the principal carbonyl group) when drawn in a Fischer projection. If the group on this bottom-most chiral carbon is on the right side, it is designated as a D-sugar. If the 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 group on the left.
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