How can you differentiate between a hemiacetal and a hemiketal based on the structure of the anomeric carbon?

• A. A hemiketal has a hydrogen atom attached to the anomeric carbon.
• B. A hemiacetal has an R group attached to the anomeric carbon.
• C. Both hemiacetals and hemiketals have identical structures at the anomeric carbon.
• D. A hemiacetal has a hydrogen atom attached to the anomeric carbon.

Answer: (D)