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': 'The ability of a screening test to detect "true positive" is known as - \nSelect and explain. \nA. Sensitivity, B. Specificity, C. Positive predictive value, D. Negative predictive value', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Sensitivity is the ability of a test to identify correctly all those who have the disease, that is &;true positive&;Specificity is the ability of a test to identify correctly all those who do not have the disease, that is &;true negative&;', 'role': 'assistant'}]