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
If prevalence is increased, which of the following will be seen ? 
Select and explain. 
A. Sensitivity increase, B. Specificity decrease, C. Increase positive predictive value, D. Decrease positive predictive value
C: Increase positive predictive value
Answer: C: Increase positive predictive value 
Explanation: Ans. is 'c' i.e., Increase positive predictive value