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': 'Spinbarkeitt is mostly demonstrated in the ....phase : \nSelect and explain. \nA. Proliferative, B. Secretary, C. Menstrual, D. Just before menstruation', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Proliferative', 'role': 'assistant'}]