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': 'Pap smear is an example of - \nSelect and explain. \nA. Primary level of prevention, B. Secondary level of prevention, C. Teritary level of prevention, D. None of the above', 'role': 'user'}, {'content': "Answer: B \nExplanation: Ans. is 'b' i.e., Secondary level of prevention o In secondary prevention, action halts the progress of a disease at its incipient stage and prevents complication. o Screening tests (e.g. - Pap smear), helps in diagnosis at early stage so that adequate treatment can halt disease progression and prevent complication.", 'role': 'assistant'}]