This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Physiology
Which is not produced enteroendocrinally 
Select and explain. 
A. Intrinsic factor, B. Secretin, C. Motilin, D. GIP
A: Intrinsic factor
Answer: A: Intrinsic factor 
Explanation: Enteroendocrinal cells are the hormone secreting cells present in the glands or mucosa of the GIT particularly stomach & intestine. The enteroendocrinal cells present in gastric glands are

G cells- secrete gastrin
Enterochromaffin (EC) cells- secrete serotonin
Enterochromaffin like (ECL) cells- secrete histamine