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: Pediatrics
Cause of hypophosphatemic rickets - A/E ? 
Select and explain. 
A. Vit D deficiency, B. CRF, C. X-linked hypophosphatemic rickets, D. Fanconi syndrome
B: CRF
Answer: B: CRF 
Explanation: Ans. is 'b' i.e., CRF