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': 'All are true regarding vitamin D, except ? \nSelect and explain. \nA. Sunlight is impoant, B. 1-hydroxylation in liver, C. Active form is calcitriol, D. RDA is for children is 400 IU', 'role': 'user'}, {'content': "Answer: B \nExplanation: Ans. is 'b' i.e., 1-hydroxylation in liver", 'role': 'assistant'}]