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: Medicine
The mutation associated with X linked Alpo Syndrome is: 
Select and explain. 
A. COL4A1, B. COL4A3, C. COL4A4, D. COL4A5
D: COL4A5
Answer: D: COL4A5 
Explanation: Alpo Syndrome (AS) AS, X-linked- COL4A5 AS, autosomal recessive - COL4A3 and COL4A4 AS, autosomal dominant - COL4A3 and COL4A4 Benign familial hematuria - COL4A3 and COL4A4 AS with diffuse leiomyomatosis- COL4A5 and COL4A6 Ref: Dan Med Bull 2009; 56:105-52