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
Specificity is related to: 
Select and explain. 
A. True positive, B. True negative, C. False positive, D. False negative
B: True negative
Answer: B: True negative 
Explanation: Ans. is 'b' ie true negatives Sensitivity -is defined as the ability of a test to identify correctly those who have the disease that is 'true positives \Specificity -is defined as the ability of a test to identify correctly those who do not have the disease. That is 'true negatives.9