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': 'Which of the following statements about tubercular osteomyelitis is not true? \nSelect and explain. \nA. It is a type of secondary osteomyelitis, B. Sequestrum is uncommon, C. Periosteal reaction is characteristic, D. Inflammation is minimal', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Tuberculous infection of bone (osteomyelitis) is a form of secondary osteomyelitis caused by hematogenous dissemination from a primary infected visceral focus. The primary focus may be active or quiescent, apparent or latent, either in the lungs, lymph glands or other viscera.\nPeriosteal reaction is minimal and abscess does not show characteristic signs of inflammation. Sequestra are also very uncommon.', 'role': 'assistant'}]