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
Inferior thyroid vein drains into - 
Select and explain. 
A. Internal jugular vein, B. Superior vena cava, C. Brachiocephalic vein, D. External jugular vein
C: Brachiocephalic vein
Answer: C: Brachiocephalic vein 
Explanation: Venous drainage of the thyroid:-

Superior thyroid vein - Drains into an Internal jugular vein.
Middle thyroid vein - Drains into the internal jugular vein.
Inferior thyroid vein - Drains into a Left brachiocephalic vein.
Fourth thyroid vein of Kocher - Drains into the internal jugular vein.