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: Surgery
[{'content': 'The number of degree of freedom in a table of ( 4 x 4 ) is : \nSelect and explain. \nA. 4, B. 8, C. 9, D. 16', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Degree of freedom = (c-1) x (r-1) Where c = no. of columns r = no. of rows In question: Number of rows = 4 Number of columns = 4 So degree of freedom = (4-1) (4-1) = 3 x 3 = 9', 'role': 'assistant'}]