This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Infertility, Subject name: Gynaecology & Obstetrics
[{'content': 'WHO 2010 definition of normal sperm count : \nSelect and explain. \nA. more than or equal to10 million/ml, B. more than or equal to 20 million/ml, C. more than or equal to 40 million/ml, D. more than or equal to 50 million/ml', 'role': 'user'}, {'content': "Answer: B \nExplanation: WHO definition for sperm concentration is 20 million/ml or more. Otherwise total sperm count is >40 million per ejaculate or more. Shaw's Textbook of Gynaecology 16th edition page no 243 Image Refeence: DC Dutta's Textbook of Gynecology , page no.190", 'role': 'assistant'}]