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': 'Pacemaker of the...........is located in: \nSelect and explain. \nA. Cardiac end of stomach, B. Long muscle of small intestine, C. Pyloric end of stomach, D. Central control of CBD origin', 'role': 'user'}, {'content': 'Answer: C \nExplanation: C i.e. Pyloric end of stomach', 'role': 'assistant'}]