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': 'Positive predictive value of a test does not depends upon \nSelect and explain. \nA. Incidence of disease, B. Specificity, C. Prevalence of disease, D. Sensitivity', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]