Final answer:
The functional sidegroup called an alcohol is represented by Od-OH, which has a hydroxyl group (-OH).
Step-by-step explanation:
An alcohol is a functional group that consists of a hydroxyl group (-OH) attached to a carbon atom. Among the given options, the functional group called an alcohol is represented by the sidegroup Od-OH. The hydroxyl group (-OH) in this sidegroup is what makes it an alcohol.
Learn more about Functional sidegroups called alcohols