This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Biostatistics, Subject name: Social & Preventive Medicine
[{'content': 'True negative means- \nSelect and explain. \nA. Sensitivity, B. Specificity, C. Positive predictive value, D. Negative predective value', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Ref:Parks 23rd edition pg 136 specificity is defined as the ability of a test to identify those who do not have the disease. That is true negatives.', 'role': 'assistant'}]