<prompt> Definite contraindication for bag and mask ventilation is:Cleft lipCleft palateCongenital diaphragmatic herniaUmbilical hernia  <response>: c. Congenital diaphragmatic herniaRef: AAP guidelines 2015, Ghai 8e p 126-133Bag mask ventilation should be avoided in Congenital diaphragmatic hernia, because it enlarges the stomach and small bowel and thus makes oxygenation more difficult. 