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
[{'content': 'You have diagnosed a patient clinically as having SLE and ordered 6 tests. Out of which 4 tests have come positive and 2 are negative. To determine the probability of SLE at negative. To determine the probability of SLE at this point, you need to know- \nSelect and explain. \nA. Prior Probability of SLE; sensibility and specificity of each test, B. Incidence of SLE predictive value of each test, C. Incidence and prevalence of SLE, D. Relative risk of SLE in this patient', 'role': 'user'}, {'content': 'Answer: A \nExplanation: .sensitivity is the ability of a test to identify correctly those who actually have the disease,that is true positives.specificity is the ability of a test to identify correctly those who in actual do not have the disease.prior probability of disease such as SLE can be calculated by knowing these. ref:park&;s textbook,22 nd ed,pg 131', 'role': 'assistant'}]