Correct Option: B. The stomach is famous for its secretion of hydrochloric acid. It is secreted from parietal cellsparietal cellsParietal cells (also known as oxyntic cells) are epithelial cells in the stomach that secrete hydrochloric acid (HCl) and intrinsic factor. These cells are located in the gastric glands found in the lining of the fundus and body regions of the stomach.
› wiki › Parietal_cellParietal cell - Wikipedia into the lumen where it establishes an extremely acidic environment. This acid is important for activation of pepsinogen and inactivation of ingested microorganisms such as bacteria.