This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Vascular surgery, Subject name: Surgery
According to Spetzler main grading system for AV malformation the score of AV malformation of size 3-6 mm with deep venous drainage and location near internal capsule is 
Select and explain. 
A. 2, B. 3, C. 4, D. 5
D: 5
Answer: D: 5 
Explanation: .