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': 'The commonest cause of spinal cord injuries in our country is: \nSelect and explain. \nA. Road traffic accident, B. Fall from a height, C. Fall into well, D. House collapse', 'role': 'user'}, {'content': 'Answer: B \nExplanation: B i.e. Fall from height', 'role': 'assistant'}]