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: Social & Preventive Medicine
[{'content': 'What is the probability that confounding factor fall to the right of 95% - \nSelect and explain. \nA. 1 in 5, B. 1 in 10, C. 1 in 20, D. 1 in 40', 'role': 'user'}, {'content': 'Answer: D \nExplanation: None', 'role': 'assistant'}]