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
[{'content': 'Indications of tracheostomy are – a) Flail chestb) Head injuryc) Tetanusd) Cardiac tamponadee) Foreign body \nSelect and explain. \nA. bcde, B. abcd, C. abce, D. abde', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Flail chest due to multiple rib fracture, coma due to head injury, respiratory muscle spasm due tetanus and laryngeal foreign body are indications for tracheostomy.', 'role': 'assistant'}]