<prompt> Specificity of a screening test is the ability of a test to detect:True positivesFalse positivesFalse negativesTrue negatives  <response>: Ans. is d i.e. True negatives Sensitivity is the ability of test to identify correctly all those who have the disease, i.e. true positives.Specificity is the ability of a test to identify correctly those who do not have the disease, i.e. true negatives. 