<prompt> Contraindication for bag and mask ventilation among the following is:Meconium aspirationTracheo esophageal fistulaCongenital lung cystBirth asphyxia  <response>: Ans: a Meconium aspiration Ref: O.P. Ghai, ed, p. 141Bag and mask ventilation is contraindicated in suspected or confirmed diaphragmatic hernia, in non vigorous babies bom through meconium stained liquor, bag and mask ventilation is done only after tracheal suctioning. 