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
A 4-year-old child was intubated while posted for craniotomy. Suddenly anesthetic machine staed showing bellowing. Next management is: 
Select and explain. 
A. Sta manual ventilation, B. Do nothing, C. Larger size of endotracheal tube, D. Increase flow rate
C: Larger size of endotracheal tube
Answer: C: Larger size of endotracheal tube 
Explanation: Ans. c. Larger size of endotracheal tube The question is incomplete (not recalled properly).