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': 'Screening of cervical cancer at PHC levels is by: \nSelect and explain. \nA. History, B. Coloposcopy, C. Pap smear, D. CT Scan', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Pap smear', 'role': 'assistant'}]