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
Odema occurs when plasma protein level is below? 
Select and explain. 
A. 8 mg/dl, B. 2 mg/dl, C. 5 mg/dl, D. 10 mg/dl
C: 5 mg/dl
Answer: C: 5 mg/dl 
Explanation: Ans. is 'c' i.e., 5 mg/dl