The figure below shows the electrostatic potential map of the molecule glycine. Based on the figure, which is the most acidic hydrogen in glycine?

• A. The H in the –OH group is the most acidic hydrogen.
• B. The H in the –CH₂ group is the most acidic hydrogen.
• C. The H in the –NH₃⁺ group is the most acidic hydrogen.
• D. The H in the –CH group is the most acidic hydrogen.

Answer: (C)