Medicine Light criteria for pleural effusion are all except – A Effusion protein/serum protein ratio greater than 0.5 B Effusion lactage dehydrogenase (LDH)/serum LDH ratio greater than 0.6 C Effusion LDH level greater than two-thirds the upper limit of the laboratory's reference range of serum LDH D Effusion sugar is less than 2/3rd of blood sugar 💡 Explanation Light criteria for pleural effusion are all except - ✓ Correct Answer: D. Effusion sugar is less than 2/3rd of blood sugar