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
[{'content': "Cephalic phase of gastric secretion can be demonstrated by the following experiment: \nSelect and explain. \nA. Heidenhain's pouch, B. Condition reflex, C. Pavlov's pouch, D. None of the above", 'role': 'user'}, {'content': "Answer: C \nExplanation: A part of stomach is incompletely separated from the main portion and made into a small bag like pouch, which is called as pavlov's pouch.", 'role': 'assistant'}]