This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Paediatrics, Subject name: Pediatrics
Absolute C/I of Bag & Mask ventilation 
Select and explain. 
A. Tracheoesophageal fistula, B. Congenital diaphragmatic hernia, C. Choanal atresia, D. Cleft palate
B: Congenital diaphragmatic hernia
Answer: B: Congenital diaphragmatic hernia 
Explanation: Absolute C/I of Bag and Mask ventilation is - CDH Also know Q The resuscitation bag should have capacity of 240 to 750 mL Reservoir +O2 attached - Fio2 delivered >90% Only reservoir attached - [?] 21% Only oxygen & no reservoir - [?] 40 Q Indications of PPV - 1. Apnea 2. Gasping 3. HR <100/min inspite of 100 percent oxygen Q Most successful indicator of successful resuscitation - Improvement in hea rate.