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
Food in stomach 
Select and explain. 
A. Enterochromaffin cells, B. Adrenal medulla, C. Adrenal coex, D. Thyroid
A: Enterochromaffin cells
Answer: A: Enterochromaffin cells 
Explanation: Enterochromaffin cells