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': 'PPV does not depend on \nSelect and explain. \nA. Sensitivity, B. Specificity, C. Prevalence of disease, D. Incidence of disease', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Positive Predictive Value(PPV) depends on\n\nSensitivity\nSpecificity\nPrevalence of disease\n\nPPV\xa0∝ Prevalence of disease.\nPPV is directly proportional to prevalence of disease.', 'role': 'assistant'}]