This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Head and neck, Subject name: Anatomy
[{'content': 'The most common site of Tracheostomy \nSelect and explain. \nA. Superior thyroid region, B. Retro thyroid region, C. Infra thyroid region, D. Lateral thyroid region', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Tracheostomy is an operation in which the trachea is opened and a tube inseed into it to facilitate breathing. It is most commonly done in the retrothyroid region after retracting the isthmus of the thyroid gland. A suprathyroid tracheostomy is liable to stricture, and an infrathyroid one is difficult due to the depth of the trachea and is also dangerous because numerous vessels lie anterior to the trachea here.Ref: BD Chaurasia; Volume 3; 6th edition; Anterior Triangle of the Neck; Page no: 139', 'role': 'assistant'}]