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': 'Contraceptive vaginal foam tablet "today "contains: \nSelect and explain. \nA. Nonoxynol 9, B. Octoxynol 9, C. Menfegol, D. None of the above', 'role': 'user'}, {'content': 'Answer: A \nExplanation: TODAY: It contains 1 gm of NONOX 4 NOL-9', 'role': 'assistant'}]