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
The ability of a screening test to detect "true positive" is known as - 
Select and explain. 
A. Sensitivity, B. Specificity, C. Positive predictive value, D. Negative predictive value
A: Sensitivity
Answer: A: Sensitivity 
Explanation: Sensitivity is the ability of a test to identify correctly all those who have the disease, that is &;true positive&;Specificity is the ability of a test to identify correctly all those who do not have the disease, that is &;true negative&;