Question

which of the following is a carboxyl group? -oh -nh2 -c-o -cooh

Explanation:

The carboxyl group is a functional - group consisting of a carbon - oxygen double bond and a hydroxyl group attached to the same carbon atom, represented as -COOH. -OH is a hydroxyl group, -NH₂ is an amino group, and -C - O is an incomplete or incorrect representation for a common functional group.

Answer:

-COOH