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: Pathology
[{'content': 'Brown pigmentation is seen in which disease \nSelect and explain. \nA. Addison’s disease, B. HHyperthyroidism, C. Nephritis, D. All of the above', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]