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
All of the following are true about venous drainage of esophagus except: 
Select and explain. 
A. Thoracic esophagus drains into the azygos vein, B. Esophageal veins drain into a submucosal plexus, C. The cervical esophagus drains directly into the right brachiocephalic vein, D. Lower esophageal veins anastomose with the left gastric vein
C: The cervical esophagus drains directly into the right brachiocephalic vein
Answer: C: The cervical esophagus drains directly into the right brachiocephalic vein 
Explanation: Ans: C. The cervical esophagus drains directly into the right brachiocephalic vein(Ref: Gray's 411e p1111, 40Ie p950).Cervical pa of esophagus is drained into inferior thyroid vein, not the right brachiocephalic vein.Venous drainage of esophagus:Cervical pa is drained by inferior thyroid vein.Thoracic pa is drained by azygous and hemiazygous veins.Abdominal pa is drained by two venous channels, hemiazygous vein and left gastric vein.