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': 'Left atrial hyperophy is seen radiologically as: \nSelect and explain. \nA. Double cardiac silhoutte, B. Left bronchial elevation, C. Right ant. oblique view in barium swallow, D. All of the above', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Ans. All of the above', 'role': 'assistant'}]