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 ability of a screening test to detect "true positives" is known as - \nSelect and explain. \nA. Sensitivity, B. Specificity, C. Positive predictive value, D. Negative predictive value', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]