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': 'Non Parametric tests among the following: \nSelect and explain. \nA. Mann Whitney test, B. Student t-test, C. Pearson correlation, D. ANOVA', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]