This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Anaesthesia
Following are steps of rapid sequence intubation except 
Select and explain. 
A. i.v thiopentone + i.v succinylcholine is used for paralysis with induction, B. Bag and mask ventilation is used for positive pressure ventilation., C. Sellick’s maneuver is used to prevent aspiration, D. Pre-oxygenation is mandatory.
B: Bag and mask ventilation is used for positive pressure ventilation.
Answer: B: Bag and mask ventilation is used for positive pressure ventilation. 
Explanation: Bag and maskventilation is contraindicated in rapid sequence intubation because of risk of aspiration.