This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Epidemiology, Subject name: Social & Preventive Medicine
Select false statement regarding Receiver Operating Characteristic (ROC):- 
Select and explain. 
A. Trading off between sensitivity and specificity is achieved by ROC curve, B. Higher is the curve better is the screening test/ cut-off, C. It represents Likelihood ratio of positive test, D. None of above
D: None of above
Answer: D: None of above 
Explanation: Receiver Operating Characteristic(ROC)curve:- Trading off b/w sensitivity & specificity is achieved by ROC curve. Black: No use Red: Fair Blue: Good Higher is the curve better is the screening test. It represents LR+ (likelihood ratio of positive test) Uses of ROC curve:- Determining the threshold for screening/ diagnosis of a positive test. Comparison of two or more screening/ diagnosis test of a disease with each other.