This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Miscellaneous, Subject name: Radiology
[{'content': 'Microcalcifications in mammography measure less than? \nSelect and explain. \nA. 0.5 mm, B. 1 mm, C. 1.5 mm, D. 2.0 mm', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Ans BThe term microcalcification refers to calcifications of whom diameter is inferior to 1 mm, knowing that current spatial resolution mammographs make small objects to be detected without magnification for a size ranged between 100 and 200 umCalcifications with a higher probability of malignancy are fine pleomorphic, fine linear and fine linear branching', 'role': 'assistant'}]