This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: General obstetrics, Subject name: Anatomy
[{'content': 'Size of resting follicle : \nSelect and explain. \nA. 0.2 mm, B. 0.02 mm, C. 2 mm, D. 20 mm', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Size of resting follicle -0.02 mm Size of follicle just before ovulation -20 mm.', 'role': 'assistant'}]