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: Gynaecology & Obstetrics
[{'content': 'The spinbarkeit of cervical mucous in a woman is maximum at one of the following phases of the cycle : \nSelect and explain. \nA. Early proliferative, B. Ovulatory phase, C. Post-ovulatory phase, D. Menstrual phase', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Ovulatory phase', 'role': 'assistant'}]