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: Anatomy
The deepest layer of cervical fascia is: 
Select and explain. 
A. Vertebral, B. Carotid sheath, C. Deep fascia, D. Prevertebral fascia
D: Prevertebral fascia
Answer: D: Prevertebral fascia 
Explanation: The arrangement of layers from outside to inside is:
a. Pretracheal fascia b. Investing fascia c. Prevertebral fascia
The prevertebral fascia extends medially behind the carotid vessels, where it assists in forming their sheath and passes in front of prevertebral muscles.