This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Airway, Subject name: Anaesthesia
What is the usual suction time of tracheostomy tube? 
Select and explain. 
A. 10-15 seconds, B. 45 seconds, C. 60 seconds, D. 30 seconds
A: 10-15 seconds
Answer: A: 10-15 seconds 
Explanation: Minimal time should be taken for suctioning to minimize the time period of ventilator disconnect . 10 secs is enough time for suctioning.