<prompt> Most common cause of respiratory distress after bih in first 24 hours is -Neonatal sepsisMeconium aspirationBacterial pneumoniaAir embolism  <response>: Ans. is b i.e., Meconium aspiration o Most common cause of respiratory distress in a term or post-term neonate -4 Meconium aspiration. o Most common cause of respiratory distress in a preterm infant -- hyaline membrane disease. 