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': 'In MRI, strength of magnetic field is: \nSelect and explain. \nA. 0.5 Tesla, B. 1.1 Tesla, C. 5 Tesla, D. 11 Tesla', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Ans. 1.1 Tesla', 'role': 'assistant'}]