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': 'In which condition, a rubber -- ring passary is an appropriate management for a woman who is having utero -- vaginal prolapse : \nSelect and explain. \nA. Old age, B. Active reproductive age, C. Early pregnancy, D. Prolapse associated with carcinoma of cervix', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Early pregnancy', 'role': 'assistant'}]