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: Medicine
[{'content': 'Oral contraceptive agents typically causes: \nSelect and explain. \nA. Microvesicular fatty infiltration in liver, B. Cholestasis without poal inflammation, C. Peripoal inflammation, D. Perivenular fibrosis in poal circulation', 'role': 'user'}, {'content': 'Answer: B \nExplanation: OCP has cholestatic side effect but without causing poal inflammation. Ref: Harrisons principles of internal medicine, 18th edition, Page 2560, Table - 305-1.', 'role': 'assistant'}]