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': "A patient aged 50 years presented with a history of jaw expansion and enlargement of maxilla \nSelect and explain. \nA. Paget's disease, B. Acromegaly, C. Fibrous dysplasia, D. Hyperparathyroidism", 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]