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': 'Calculated positive predictive value of ELISA test for HIV with sensitivity 99%, specificity 99% , prevalence of HIV in population 5/1000 ? \nSelect and explain. \nA. 10, B. 70, C. 33, D. All', 'role': 'user'}, {'content': "Answer: C \nExplanation: Ans. is 'c' i.e., 33", 'role': 'assistant'}]