Surgery General f8b9d4b1 Pleural fluid LDH / Serum fluid LDH ratio is _____, to in exudation pleural effusion A > 0.3 B > 0.5 C > 0.6 D > 0.8 High-Yield Explanation Pleural Fluid LDH is > 2/3rd of serum LDH in exudative pleural effusion. Hence Pleural Fluid LDH / Serum LDH is > 0.6.