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: Surgery
[{'content': 'Block veebrae are seen in ? \nSelect and explain. \nA. Pagets disease, B. Leukemia, C. TB, D. Klippel - Feil syndrome', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Ans. is i.e., Klippel - Feil syndrome A block veebra is a type of veebral anomaly where there is a failure of separation of two or more adjacent veebral bodies Associations There is a frequent association with hemiveebrae / absent veebra above or below block level, posterior element fusion Fusion of multiple cervical veebral bodies is also seen in Klippel-Feil syndrome and VACTREL anamoly.', 'role': 'assistant'}]