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 the field used is \nSelect and explain. \nA. 0.05 tesla, B. 100 tesla, C. 1.1 tesla, D. 11 tesla', 'role': 'user'}, {'content': 'Answer: C \nExplanation: MR scans are obtained by placing the patient in a static magnetic field of 0.02 to 4 tesla (T) strength.', 'role': 'assistant'}]