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': 'The correlation between age and height in a toddler is best depicted by \nSelect and explain. \nA. Correlation coefficient = +1, B. Correlation coefficient = -1, C. Correlation coefficient = +2, D. None', 'role': 'user'}, {'content': "Answer: A \nExplanation: Ref:Park's textbook of Preventive and Social Medicine 25 th Ed", 'role': 'assistant'}]