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': 'A screening test has 90% sensitivity and 90% specificity. Diseased population is 10% What is PPV ? \nSelect and explain. \nA. PPV 80%, B. PPV 85%, C. PPV 90%, D. PPV 95%', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Sensitivity = 90%\nSpecificity = 90%\nPrevalence = 10%\n(i) Formula for PPV according to Bayes Theorem,', 'role': 'assistant'}]