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': 'Most common movemnet force involved in fractures of the spine is which of the following? \nSelect and explain. \nA. Flexion, B. Extension, C. C Rotation, D. Compression', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Flexion injury is the commonest spinal injury. Ref: Essential ohopedics by Maheshwari 3rd Edition, Page 144,259,260.', 'role': 'assistant'}]