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
Laser welding: 
Select and explain. 
A. Involves high heat generation, B. Can be done with pure titanium, C. Is not used in dentistry, D. Can he done with pure gold
B: Can be done with pure titanium
Answer: B: Can be done with pure titanium 
Explanation: None