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
External maxillary artery is a branch of: 
Select and explain. 
A. Internal carotid artery, B. External carotid artery, C. Second part of trigeminal artery, D. Facial artery
B: External carotid artery
Answer: B: External carotid artery 
Explanation: None