Mark the correct statement about the gastric cells.

Parietal or oxyntic cells secrete HCl and intrinsic factor. HCl activates pepsinogen. Intrinsic factor helps in absorption of vitamin B12. Peptic or chief cells secrete the proenzyme pepsinogen. Mucus neck cells which secrete mucus, which prevents excoriation. Gastrin is secreted by G cells off pyloric stomach acts on the gastric glands and stimulates the secretion of hydrochloric acid and pepsinogen.