Pediatrics Neonatal Resuscitation 5df9cf6e Definite contraindication for bag and mask ventilation is:- A Cleft lip B Cleft palate C Congenital diaphragmatic hernia D Umbilical hernia High-Yield Explanation Bag & mask ventilation - avoided in Congenital diaphragmatic hernia It enlarges the stomach and small bowel & makes oxygenation more difficult.