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
Specificity is represented by ? 
Select and explain. 
A. True positive/true positive + false negative, B. True negative/true positive + false negative, C. True positive/true negative + false positive, D. True negative/true negative + false positive
D: True negative/true negative + false positive
Answer: D: True negative/true negative + false positive 
Explanation: Ans. is 'd' i.e., True negative/true negative + false positive