Question

part a
the difference between an aldose sugar and a ketose sugar is
the position of the hydroxyl groups
the number of carbon atoms
the ring form and the linear chain
the position of the carbonyl group

Explanation:

Aldose sugars have an aldehyde - type carbonyl group at the end of the carbon chain, while ketose sugars have a ketone - type carbonyl group within the carbon chain. The key difference lies in the position of the carbonyl group.

Answer:

D. the position of the carbonyl group