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
Which of the following is not present on the medial surface of a submandibular gland? 
Select and explain. 
A. Styloglossus, B. Mylohyoid, C. Facial vein, D. Hyloglossus
C: Facial vein
Answer: C: Facial vein 
Explanation: None