<prompt> Which of the following will our the diagnosis of respiratory distress syndrome RDS in new born?Receipt of antenatal steroidsAir bronchogram in chest x-rayManifests after 6 hoursOccurs after term gestation  <response>: Respiratory distress syndrome RDS or Hyaline membrane disease HMD: It is the commonest cause of respiratory distress in a preterm neonate often less than 34 weeks of gestation. Other risk factors for its development includes asphyxia, acidosis, maternal diabetes and caesarean section. Respiratory distress usually manifest within first 6 hours of life. Administration of antenatal coicosteroids reduces the incidence of RDS, Necrotising enterocolitis and Intraventricular hemorrhage. Chest X-ray features of RDS: Bilateral diffuse reticulogranular opacities in the pulmonary parenchyma, pronounced hypoaeration, ground glass opacity, low lung volume, prominent air bronchograms aerated bronchioles superim posed on a background of collapsed alveoli or whiteout lung. 