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
Armoured enforcement of ET tube is used in – 
Select and explain. 
A. Neurosurgery, B. Cardiac surgery, C. Liver surgery, D. Intestinal Surgery
A: Neurosurgery
Answer: A: Neurosurgery 
Explanation: Armored ET tube (Spiral embedded) is used for head & neck, maxillofacial and neurosurgeries.