You have a diagnosed a patient clinically as having SLE and ordered 6 tests.Out of which 4 tests have common positive and 2 are negative.To determine the probability of SLE at this point, you need to know -

• A. Prior probability of SLE; sensitivity and specificity of each test
• B. Incidence of SLE and Predictive value of each test
• C. Incidence and prevalence of SLe
• D. Relative risk of SLE in this point