<prompt> Bag and mask ventilation is absolutely contraindicated inTracheo-esophageal fistula with esophageal atreasia and esophagus connected to tracheaDiaphragmatic herniaMeconium aspirationAll of the above  <response>: Bag and mask ventilation is contraindicated when there are increased chances of aspiration like :- full stomach, intestinal obstruction, pregnancy, hiatus hernia, Diaphragmatic hernia, Tracheo-esuphageal fistula, Meconium aspiration syndrome. 