This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Biostatistics, Subject name: Social & Preventive Medicine
True negative means- 
Select and explain. 
A. Sensitivity, B. Specificity, C. Positive predictive value, D. Negative predective value
B: Specificity
Answer: B: Specificity 
Explanation: Ref:Parks 23rd edition pg 136 specificity is defined as the ability of a test to identify those who do not have the disease. That is true negatives.