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': 'Post ovulation, the cervical mucus : \nSelect and explain. \nA. Shows pattern on drying, B. Is thick, C. Is thin and cellular, D. Is thin and alkaline', 'role': 'user'}, {'content': 'Answer: B \nExplanation: ls thick', 'role': 'assistant'}]