Q. Pepsin requires acidic medium for its optimal enzymatic activity. The cells of the gastric glands that secrete HCl are: 1.goblet cells 2.parietal cells 3.chief cells 4.oxyntic cells

• A. 2, 4
• B. 3, 4
• C. 2, 3
• D. 1, 2

Correct Answer: C