Anatomy Brachiocephalic vein is formed by A Internal jugular vein and suclavicular vein. B External jugular vein and suclavicular vein. C Internal jugular vein and retromandibular vein. D External jugular vein and retromandibular vein. 💡 Explanation Brachiocephalic vein is formed by ✓ Correct Answer: A. Internal jugular vein and suclavicular vein.