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
Receiver operator characteristic (ROC) curve is usually drawn between - 
Select and explain. 
A. Sensitivity and ( 1- specificity), B. (1- sensitivity) and specifivity, C. Sensitivity and specificity, D. (1- sensitivity) and (1-specificity)
A: Sensitivity and ( 1- specificity)
Answer: A: Sensitivity and ( 1- specificity) 
Explanation: Ref:Parks 23rd edition X-axis : (1-specificity) Y-axis : Sensitivity. Receiver operator curve is used to find out the cutoff Cutoff nearest to the ideal line is considered to be the best cutoff.