Which of the following are approved indications for surfacta…

Which of the following are approved indications for surfactant therapy? 1. Prophylaxis of respiratory distress syndrome (RDS) in infants with very low birth weight  2.Prophylaxis of RDS in infants with higher birth weight (>1250 g) but with immature lungs 3. Rescue treatment in infants with RDS 4. Acute respiratory distress syndrome (ARDS) in adults