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': 'Evaluation of screening test is by- \nSelect and explain. \nA. Sensitivity, B. Specificity, C. Predictive value, D. All the above', 'role': 'user'}, {'content': 'Answer: D \nExplanation: .<p>evaluation of a screening test is done by*specificity,*sensitivity,*predictive value of a positive test,*predictive value of a negative test,*percentage of false negatives,*percentage of false positives etc.</p><p>ref:park&;s textbook of preventive and social medicine,22 nd edition ,pg no 131</p>', 'role': 'assistant'}]