This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Biostatistics, Subject name: Social & Preventive Medicine
[{'content': "Association can be measured by all of the following except \nSelect and explain. \nA. Correlation coefficient, B. Cronbach's Alpha, C. P value, D. Odd's ratio", 'role': 'user'}, {'content': "Answer: B \nExplanation: Ref:Park's Textbook of Preventive and Social Medicine 25th Ed", 'role': 'assistant'}]