This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Screening, Subject name: Social & Preventive Medicine
Specificity of a test means, all except- 
Select and explain. 
A. Identifies those without disease, B. True positive, C. True negative, D. An ideal screening test should have 100% specificity
B: True positive
Answer: B: True positive 
Explanation: Ref: Parks 23rd edition pg 139 Specificity is defined as the ability of a test to identify those who do not have the disease, that is "true negatives". Ideal screening test should have been 100% specificity.