This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Renal physiology, Subject name: Physiology
All of the following decrease in the glomerular filtration rate except 
Select and explain. 
A. Decreased plasma protein levels, B. Increased tubular hydrostatic pressure, C. Decreased effective filtration surface area, D. Decreased capillary hydrostatic pressure
A: Decreased plasma protein levels
Answer: A: Decreased plasma protein levels 
Explanation: Decreased plasma protein levels decrease plasma osmotic pressure and increase plasma hydrostatic pressure, hence GFR increases Ref: Ganong's review of medical physiology; 24th edition; page no; 680