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: Dental
[{'content': 'Specificity of a screening test measures? \nSelect and explain. \nA. True positives, B. False positives, C. False negatives, D. True negatives', 'role': 'user'}, {'content': 'Answer: D \nExplanation: None', 'role': 'assistant'}]