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
Diagnostic accuracy of a test is determined by- 
Select and explain. 
A. Sensitivity, B. Specificity, C. Predictive value, D. None
C: Predictive value
Answer: C: Predictive value 
Explanation: <p>predictive value which reflects the diagnostic power of the test.the predictive accuracy depends upon specificity,and disease prevalence.the predictive value of a positive test indicates the probability that a patient with a positive test result has in fact the disease in question the more prevalent a disease is in a given in population,the more accurate will be the predictive value of a positive screening test.</p><p>ref:park&;s textbook,22 nd edition,pg no132 </p>