This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Social & Preventive Medicine
[{'content': 'The usefulness of a screening test in a community depends on its: September 2004 \nSelect and explain. \nA. Sensitivity, B. Specificity, C. Reliability, D. Predictive value', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Ans. D i.e. Predictive value', 'role': 'assistant'}]