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: Dental
[{'content': 'Which of the following test completely exclude chances of a disease? \nSelect and explain. \nA. Specificity, B. Sensitivity, C. Positive predictivity, D. Negative predictivity', 'role': 'user'}, {'content': 'Answer: D \nExplanation: None', 'role': 'assistant'}]