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': 'Most potent cholegogue is __________ \nSelect and explain. \nA. Bile salts, B. Bile acids, C. CCK, D. GIP', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Cholagogue causes gall bladder contraction. Most potent cholagogue in CCK.', 'role': 'assistant'}]