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
Carotid sheath encloses all except 
Select and explain. 
A. CCA and ICA., B. ECA and  ICA., C. Internal jugular vein, D. Vagus nerve.
B: ECA and  ICA.
Answer: B: ECA and  ICA. 
Explanation: None