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': 'Liver is darkly pigmented in \nSelect and explain. \nA. Dubin Johnson syndrome, B. Gilbert syndrome, C. Rotor syndrome, D. Crigler - Najar syndrome', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Dubin Johnson syndrome\nAutosomal recessive\nLiver darkly pigmented.', 'role': 'assistant'}]