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
In a population of 10000 people, the prevalence of a disease is 20%. The sensitivity of a screening test is 95% and specificity is 80%. The positive predictive value of the test will be - 
Select and explain. 
A. 45.70%, B. 54.30%, C. 15.30%, D. 98.50%
B: 54.30%
Answer: B: 54.30% 
Explanation: In the given question,
Sensitivity = 95%
Specificity = 80%
Prevalence = 20%
Thus,