Inferior thyroid vein drains into: (A) Internal jugular vein, (B) Superior vena cava, (C) Brachiocephalic vein, (D) EXternal jugular vein
Answer is C. The inferior thyroid veins emerge at the lower border of the isthmus. They form a plexus in front of the trachea and drain into the left brachiocephalic vein. Ref: BD Chaurasia's HUMAN ANATOMY, Volume 3, 4th edition.