(B) Hydrochloric acid, Pepsin, Mucus
The gastric glands in the stomach wall release hydrochloric acid, a protein-digesting enzyme called pepsin, and mucus.
Source: Life Processes, Section 5.2.4
The passage clearly states: "These release hydrochloric acid, a protein digesting enzyme called pepsin, and mucus." Bile is secreted by the liver (not gastric glands), trypsin and lipase come from the pancreas, and salivary amylase is from salivary glands — so options A, C, and D are wrong. Always associate gastric glands specifically with HCl + pepsin + mucus.