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': 'Ability of a screening test to diagnose true positive refers to: March 2010 \nSelect and explain. \nA. Relative risk, B. Sensitivity, C. Specificity, D. Attributable risk', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Ans. B: Sensitivity', 'role': 'assistant'}]