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: Surgery
Indication for tracheostomy are all, EXCEPT: 
Select and explain. 
A. Flail chest, B. Head injury, C. Cardiac Tamponade, D. Foreign body
C: Cardiac Tamponade
Answer: C: Cardiac Tamponade 
Explanation: Indications for tracheostomy are Flail chest, Head injury, Foreign body, Tetanus etc. Cardiac tamponade is not an indication for tracheostomy.