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: Social & Preventive Medicine
[{'content': 'Which is not a predisposing factor for carcinoma cervix? \nSelect and explain. \nA. Single child birth, B. Early coitus, C. Early child bearing, D. Early marriage', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]