This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Epidemiology, Subject name: Social & Preventive Medicine
Specificity of a screening test measures 
Select and explain. 
A. False positives, B. True positives, C. False negatives, D. True negatives
D: True negatives
Answer: D: True negatives 
Explanation: Specificity in the above image = d/(b+d)x100 Specificity is defined as the ability of a test to identify correctly those who do not have the disease, that is, "true-negatives". Ref: 25th edition, Park's Textbook of Preventive and Social Medicine, Page no. 152