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: Radiology
[{'content': 'Diagnosis of aoic calcification is done by fluoroscopy by seeing: \nSelect and explain. \nA. Side to side movement, B. Up and down movement, C. Combined movement, D. None', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Ans. Side to side movement', 'role': 'assistant'}]