Medicine All of the following are Light’s criteria for exudative I pleural effusion: A Pleural fluid protein to serum protein > 0.5 B Pleural fluid LDH to serum LDH > 0.6 C Pleural fluid LDH is > 2/3 times the normal upper limit for serum D Pleural fluid ADA to Serum ADA <16 💡 Explanation All of the following are Light's criteria for exudative I pleural effusion: ✓ Correct Answer: D. Pleural fluid ADA to Serum ADA <16