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': 'A most common site for the trauma of spine is - \nSelect and explain. \nA. Cervical, B. Thoracic, C. Lumbar, D. Sacrum', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Traumatic spine injuries most commonly affect cervical spine (50-60%) followed by dorsolumbar junction.', 'role': 'assistant'}]