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': 'Cervix carcinoma arises from: \nSelect and explain. \nA. Squamocolumnar junction, B. Isthmus, C. Cervical lip, D. Internal os', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Note:\n• M/C site for carcinoma cervix = Squamo columnar junction\n• M/C site for adenocarcinoma of cervix = Endocervix.', 'role': 'assistant'}]