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': 'Which of the following is a Prerequisite for the Chi-square test to compare - \nSelect and explain. \nA. Both sample should be mutually exclusive, B. Both sample need not be mutually exclusive, C. Normal distribution, D. All of the above', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]