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.