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
Gillmore needle is used for 
Select and explain. 
A. Testing the strength of plaster of paris, B. Evaluating the setting time of plaster of paris, C. Testing the metal hardness, D. Testing the purity of noble metals
B: Evaluating the setting time of plaster of paris
Answer: B: Evaluating the setting time of plaster of paris 
Explanation: None