This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Social & Preventive Medicine
The probability of a test detecting a truly positive person from the population of diseased is the 
Select and explain. 
A. Specificity of the test, B. Positive predictive value of the test, C. Sensitivity of the test, D. Likelihood ratio
C: Sensitivity of the test
Answer: C: Sensitivity of the test 
Explanation: Sensitivity of a screening test detects: true positives among all diseased.
Specificity of a screening test detects: true negatives among all healthy.
PPV detects: true positives among all those who are positive on a screening test
NPV detects: true negatives among all those who are negative on a screening test.