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 melting temperature of material marked with arrow is: 
Select and explain. 
A. 50.0°C to 51.1°C, B. 53.3°C to 54.4°C, C. 54.4°C to 55.6°C, D. None of the above
A: 50.0°C to 51.1°C
Answer: A: 50.0°C to 51.1°C 
Explanation: None