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: Dental
The most commonly used Titanium alloy for dental and medical purposes is 
Select and explain. 
A. Ti 6Al 4V, B. Ti 5A1 4 V, C. Ti 5Al 5V, D. Ti 6Al 6 V
A: Ti 6Al 4V
Answer: A: Ti 6Al 4V 
Explanation: None