This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Screening for Disease, Subject name: Social & Preventive Medicine
[{'content': 'Specificity of a screening test is the ability of a test to detect: \nSelect and explain. \nA. True positives, B. False positives, C. False negatives, D. True negatives', 'role': 'user'}, {'content': "Answer: D \nExplanation: Ans. is 'd' i.e. True negatives Sensitivity is the ability of test to identify correctly all those who have the disease, i.e. 'true positives'.Specificity is the ability of a test to identify correctly those who do not have the disease, i.e. 'true negatives'.", 'role': 'assistant'}]