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Which of the following correctly represents the Fischer projection of D-Glyceraldehyde?

1. Fischer projection: CH2OH at top, CHO at bottom, H on left and OH on right
2. Fischer projection: CHO at top, CH2OH at bottom, HO on left and H on right
3. Fischer projection: CHO at top, CH2OH at bottom, H on left and OH on right
4. Fischer projection: CH2OH at top, CHO at bottom, HO on left and H on right

Correct answer: Fischer projection: CHO at top, CH2OH at bottom, H on left and OH on right

Solution

D-Glyceraldehyde is defined as the enantiomer with the OH group on the right side of the Fischer projection when CHO is at the top and CH2OH is at the bottom. This is the basis of the D/L nomenclature system for carbohydrates.

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