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': 'If prevalence is increased, which of the following will be seen ? \nSelect and explain. \nA. Sensitivity increase, B. Specificity decrease, C. Increase positive predictive value, D. Decrease positive predictive value', 'role': 'user'}, {'content': "Answer: C \nExplanation: Ans. is 'c' i.e., Increase positive predictive value", 'role': 'assistant'}]