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': 'Dubin Johnson syndrome is characterised by all except \nSelect and explain. \nA. It is characterized by\u202fdefective bilirubin excretion\u202finto the bile., B. It’s a result of mutation in MRP-2., C. Rifampicin may reduce MRP-2 mutation., D. Oral contraceptives are not contraindicated in this disease.', 'role': 'user'}, {'content': 'Answer: D \nExplanation: None', 'role': 'assistant'}]