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
In oral and maxillofacial surgery, 'danger space' is known as 
Select and explain. 
A. Carotid sheath, B. Posterior to carotid sheath in posterior triangle of neck, C. Posterior to transverse process of vertebrae, D. Space between alar &prevertebral fascia
D: Space between alar &prevertebral fascia
Answer: D: Space between alar &prevertebral fascia 
Explanation: None