This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Glomerular Filtration, Renal Blood Flow, and Their Control, Subject name: Physiology
[{'content': 'All of the following decrease the Glomerular filtration rate except - \nSelect and explain. \nA. Decreased plasma protein levels, B. Increased tubular hydrostatic pressure, C. Decreased effective filtration surface area, D. Decreased capillary hydrostatic pressure', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Plasma protein binding of a substance decreases is glomerular filtration. Only unbound substances are filtered.', 'role': 'assistant'}]