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: Unknown
[{'content': 'The most common sequelae of tuberculous spondylitis in an adolescent is \nSelect and explain. \nA. Fibrous ankylosis, B. Bony ankylosis, C. Pathological dislocation, D. Chronic osteomyelitis', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Fibrous ankylosis is seen in healed tubercular joints. Bony ankylosis is seen in healed tubercular spine.', 'role': 'assistant'}]