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': 'For a screening test, 90% specificity means that 90% of non-diseased persons will give a ? \nSelect and explain. \nA. True negative result, B. True positive result, C. False negative result, D. False positive result', 'role': 'user'}, {'content': "Answer: A \nExplanation: Ans. is 'a' i.e., True negative result", 'role': 'assistant'}]