<prompt> Specificity of a test refers to its ability to detect-True positiveTrue negativesFalse negativesFalse positive  <response>: Ans. is b i.e., True negative Sensitivity It is the ability of a test to identify correctly all those who have the disease, i.e., true positive.Specificity It is the ability of a test to identify correctly those who do not have the disease i.e., true negative 