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: Surgery
Pleural fluid LDH / Serum fluid LDH ratio is _____, to in exudation pleural effusion 
Select and explain. 
A. > 0.3, B. > 0.5, C. > 0.6, D. > 0.8
C: > 0.6
Answer: C: > 0.6 
Explanation: Pleural Fluid LDH is > 2/3rd of serum LDH in exudative pleural effusion. Hence Pleural Fluid LDH / Serum LDH is > 0.6.