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 diagnostic test for a paicular disease has a sensitivity, of a 0.90 and a specificity of 0.80. A single test is applied to each subject in the population in which the diseased population is 30%. What is the probability that a person, negative to this test, has no disease - \nSelect and explain. \nA. Less than 50%, B. 70%, C. 95%, D. 72%', 'role': 'user'}, {'content': "Answer: C \nExplanation: Ans. is 'c' i.e., 95% o The probability of not having a disease after a negative screening test is measured by negative predictive value.", 'role': 'assistant'}]