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: Biochemistry
A patient with chronic renal failure and bone pains will have deficiency of which vitamin: 
Select and explain. 
A. Vitamin A, B. Vitamin B, C. Vitamin C, D. Vitamin D
D: Vitamin D
Answer: D: Vitamin D 
Explanation: None