Pleural effusion classification lights criteria

Which of the following laboratory values would meet Light’s criteria for an exudative pleural effusion?

1: Pleural fluid/serum protein ratio < 0.5
2: Pleural fluid LDH > upper limit of normal serum LDH
3: Pleural fluid/serum LDH ratio > 0.6
4: Pleural fluid glucose level > 60 mg/dL