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: Orthopaedics
[{'content': 'Brodie’s abscess is - \nSelect and explain. \nA. Chronic osteomyelitis, B. Subacute osteomyelitis, C. Acute osteomyelitis, D. Septic arthritis', 'role': 'user'}, {'content': "Answer: A \nExplanation: Chronic osteomyelitis is of 3 types: \na) chronic osteomyelitis secondary to acute osteomyelitis \nb) Garre's osteomyelitis \nc) Brodie's abscess \n\nBrodies abscess is a special type of osteomyelitis in which body's defence mechanism have been able to contain infection so as to create chronic bone abscess containing pus or jelly-like granulation tissue surrounded by a zone of sclerosis. \nC/f: Common in 11-20 years Common sites upper tibia and the lower end of femur A deep boring pain is a predominant symptom. can become worse to-night. Examination reveals tenderness and thickening of bone.", 'role': 'assistant'}]