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': 'Secondary prevention is applicable to ? \nSelect and explain. \nA. Causal factors, B. Early stage of disease, C. Late stage of disease, D. None of the above', 'role': 'user'}, {'content': "Answer: B \nExplanation: Ans. is 'b' i.e.,Early stage of disease Primordial prevention - Before risk factor present.Primary prevention - Before onset of disease (risk factor present).Secondary prevention - In early stage of disease.Teiary prevention - Late stage of disease.", 'role': 'assistant'}]