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': 'Which of the following is an electrocardiographic feature of pulmonary hypeention? \nSelect and explain. \nA. T wave inversion, B. Presence of U wave, C. SI, Q3, T3 pattern, D. PR prolongation', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Answer- A. T wave inversionThe electrocardiogram (ECG) of a patient with PH may demonstrate.Signs of right ventricular hyperophy or strain including : -Right axis detion,an R wave/S wave ratio greater than one in lead Vl (dominant R wave)', 'role': 'assistant'}]