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': 'Fat in the duodenum lumen : \nSelect and explain. \nA. Stimulates gall bladder contraction, B. Inhibits gall bladder contraction, C. Inhibits CCK secretion, D. Releases Secretin', 'role': 'user'}, {'content': 'Answer: A \nExplanation: A i.e. Stimulates gall bladder contraction', 'role': 'assistant'}]