This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Cardiovascular system, Subject name: Radiology
[{'content': 'The most accurate investigation for assessing ventricular function is - \nSelect and explain. \nA. Multislice CT, B. Echocardiography, C. Nuclear scan, D. MRI', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Echo can assess left ventricular global and regional function and as well as systolic and diastolic function.', 'role': 'assistant'}]