What Is a Hemiacetal

What is a hemiacetal?

A) A hemiacetal, prepared from an alcohol and an aldehyde, is a compound that contains both OH and OR groups on the same carbon.
B) Compounds prepared from ketones and alcohols and with OH and OR groups on the same carbon are known as hemiacetals.
C) A hemiacetal is a product of acetyl group hydrolysis; it contains a COOH group.
D) A hemiacetal is formed from alcohols and acetic acid; a hemiacetal has both acetyl and OH groups on the same carbon atom.
E) A hemiacetal, formed from an aldehyde and an alcohol, has OH and aldehyde groups on adjacent carbon atoms in its structure.