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': 'Ventricular aneurysm has one of the following characteristic features - \nSelect and explain. \nA. Persistent ST segment elevation, B. Persistent ST segment depression, C. Left bundle branch block, D. Right bundle branch block', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]