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: Medicine
[{'content': 'In left sided massive pneumothorax, ECG shows all, except \nSelect and explain. \nA. Left axis detion, B. Absent R wave, C. Peaked P wave, D. Precordial T wave inversion', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Answer is A (Left axis detion): Left-sided pneumothorax is associated with right axis detion.', 'role': 'assistant'}]