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': 'The positive predictive value of a screening test depends on \nSelect and explain. \nA. Sensitivity of the test, B. Specificity of the test, C. Value of the test, D. Efficiency of the test', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]