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
Which of the following is/are true about a screening test ? 
Select and explain. 
A. Sensitivity is 1 - False positive rate, B. Sensitivity is 1 - False negative rate, C. Post-test probability is pre-test probability multiplied by prevalence, D. None of the above
D: None of the above
Answer: D: None of the above 
Explanation: Ans. is `d' i.e., None of the above False positive rate = 1-specificity or Specificity = 1-false positive rate False negative rate -- 1-sensitivity or Sensitivity = 1-false negative rate Post test probability = Pretest probability Likelihood ratio o Predictive value depends upon prevalance.