This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: G.I.T, Subject name: Physiology
Parietal cell secretes 
Select and explain. 
A. Mucus, B. Pepsinogens, C. Gastrin, D. Intrinsic factor
D: Intrinsic factor
Answer: D: Intrinsic factor 
Explanation: Parietal cells located deep in the oxyntic glands secrete HCl & intrinsic factor. -Mucus is secreted by mucous neck cells of oxyntic glands. Pepsinogen is secreted by chief/peptic cells of oxyntic glands. -G cells of pyloric glands release hormone gastrin. Reference: Guyton,11e