Answer the following question given this paragraph: 

A secondary alcohol forms a ketone when oxidized. The secondary alcohol cannot be further oxidized to produce a carboxylic acid. Tertiary alcohols cannot be oxidized in this way, because the carbon atom bonded to the OH group is not also bonded to any hydrogens.


Q: What forms a ketone when oxidized?

 Choices:

- enzyme

- aldehyde

- carbolic acid

- secondary alcohol

A:
secondary alcohol
