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': 'Time taken for conversion of CIN cervix to invasive carcinoma is - years : \nSelect and explain. \nA. 5, B. 10, C. 15, D. 20', 'role': 'user'}, {'content': 'Answer: B \nExplanation: 10', 'role': 'assistant'}]