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: Physiology
[{'content': 'Which of the following statements about Recommended Dietary Allowances (RDA) is true \nSelect and explain. \nA. RDA is statistically defined as two standard detions (SD) above Estimated Average Requirement (EAR), B. RDA is defined as being equal to the Estimated Average Requirement (EAR), C. RDA is defined as being equal to Adequate Intake (AI), D. RDA is defined as the recommended minimum requirement', 'role': 'user'}, {'content': 'Answer: A \nExplanation: A i.e. RDA is statistically defined as two standard detions (SD) above Estimated Average Requirement (EAR)', 'role': 'assistant'}]