This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Endocrinology metabolism, Subject name: Physiology
[{'content': "Which among the following doesn't have a role in regulating Vitamin D metabolism? \nSelect and explain. \nA. Liver, B. Lungs, C. Kidney, D. Skin", 'role': 'user'}, {'content': 'Answer: B \nExplanation: ANSWER: (B) LungsREF: Guyton physiology 11th edition page 983Cholecalciferol (Vitamin D3) Is Formed in the Skin.Cholecalciferol Is Converted to 25-Hydroxycholecalciferol in the Liver.Formation of 1, 25-Dihydroxycholecalciferol takes place in the Kidneys', 'role': 'assistant'}]