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': 'Reliability of a screening test refers to: \nSelect and explain. \nA. Accurately measures what it is supposed to measure, B. Gives same values even on repeated testing, C. The extent to which the observer can go in finding the result, D. Depends on knowledge of the observer', 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]