Inferior thyroid vein drains into -: (A) Internal jugular vein, (B) Superior vena cava, (C) Brachiocephalic vein, (D) External jugular vein
Answer is C. 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.