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
What causes edema in nephrotic syndrome? 
Select and explain. 
A. Na and water restriction, B. Increased venous pressure, C. Hypoalbuminemia, D. Hyperlipidemia
C: Hypoalbuminemia
Answer: C: Hypoalbuminemia 
Explanation: . Hypoalbuminemia