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
Most common cause of nephrotic range proteinuria in an adult is - 
Select and explain. 
A. Diabetes Mellitus, B. Amyloidosis, C. Hypertensive nephropathy, D. Wegner's Granulomatosis
A: Diabetes Mellitus
Answer: A: Diabetes Mellitus 
Explanation: None