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': 'HCL secretion is stimulated by: \nSelect and explain. \nA. Secretin, B. Somatostatin, C. Histamine, D. All', 'role': 'user'}, {'content': 'Answer: C \nExplanation: C i.e. Histamine', 'role': 'assistant'}]