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 vein formed by union of posterior division of retromandibular vein and posterior auricular vein is 
Select and explain. 
A. Common facial vein, B. Anterior jugular vein, C. External jugular vein, D. Interior jugular vein
C: External jugular vein
Answer: C: External jugular vein 
Explanation: External jugular vein is formed by posterior auricular vein and posterior division of retromandibular vein.