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: Pathology
A 62 year old from Wales presently in US develops oliguria and peripheral edema over a period of weeks. Urinalysis reveals hematuria and proteinuria; examination of the urinary sediment reveals red cell casts. Renal biopsy shows many glomerular crescents. This presentation is mostsuggestive of which of the following conditions? 
Select and explain. 
A. Rapidly progressive glomerulonephritis, B. Diabetic nephropathy, C. Hypeensive nephropathy, D. Lupus nephritis
A: Rapidly progressive glomerulonephritis
Answer: A: Rapidly progressive glomerulonephritis 
Explanation: Rapidly progressive giomeruloephritis