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
Which among the following doesn't have a role in regulating Vitamin D metabolism? 
Select and explain. 
A. Liver, B. Lungs, C. Kidney, D. Skin
B: Lungs
Answer: B: Lungs 
Explanation: 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