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
The superior and inferior ophthalmic veins drain into the: 
Select and explain. 
A. Internal jugular vein, B. Pterygoid plexus, C. Frontal vein, D. Facial vein
D: Facial vein
Answer: D: Facial vein 
Explanation: The superior and inferior ophthalmic veins drain into the facial vein and cavernous sinus.