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
Positive predictive value of a screening test is measured by- 
Select and explain. 
A. True positive x 100 (True positive + False positive), B. True negative x 100 (false positive + false negative), C. True positive x 100\/ (True positive + False negative), D. True negative x 100 (True positive + False negative
A: True positive x 100 (True positive + False positive)
Answer: A: True positive x 100 (True positive + False positive) 
Explanation: .