A Common Misconception Is That the Following Molecule Contains Two

A common misconception is that the following molecule contains two functional groups, an alcohol and a ketone, but this is not the case. What functional group does this molecule actually contain and why is it important to differentiate between this functional group and an alcohol?

A) This molecule contains a carboxylic acid, which reacts very differently than an alcohol.
B) This molecule contains a carboxylic acid, which is an isomer of an alcohol.
C) This molecule contains a carbonyl, which hydrogen bonds much more than an alcohol.
D) This molecule contains a carbonyl, which reacts very differently than an alcohol.
E) This molecule contains a carboxylic acid, which is unreactive.