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: Unknown
[{'content': 'Which of the following statement are true regarding RDA ? \nSelect and explain. \nA. RDA is statistically defined as two standard deviation above the estimated average requirement (EAR), B. RDA is statistically defined as equal to the EAR, C. RDA is statistically defined as equal to the adequate intake, D. RDA is defined as the recommended minimum requirement', 'role': 'user'}, {'content': 'Answer: A \nExplanation: RDA (Recommended dietary allowance) :\nAmount of nutrient estimated to meet the nutrient requirement of 97% to 98% of healthy individual in an age and gender group.\nRDA = EAR + 2SDEA', 'role': 'assistant'}]