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': 'In a Chi - square test for the following data, the degree of freedom will be: \nSelect and explain. \nA. 2, B. 4, C. 6, D. 8', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Degree of freedom\xa0 (d.f):\nIt depends upon the number of columns and rows in the original table.\nd.f = (column-1) (row-1)\n= (3-1) (2-1)\n= 2', 'role': 'assistant'}]