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': 'True negative means - \nSelect and explain. \nA. Sensitivity, B. Specificity, C. Positive predictive value, D. Negative predictive value', 'role': 'user'}, {'content': 'Answer: B \nExplanation: .true negative means specificity.it is defined as the ability of a test to identify correctly those who do not have the disease that is true negatives. ref:park&;s textbook,22nd edition,pg no 112', 'role': 'assistant'}]