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
Binder in investment for dental castings: 
Select and explain. 
A. Brings about reduction in expansion, B. Provides adequate strength to the investment, holds ingredients together and provides rigidity, C. Is usually a form of silica, D. Can be safely heated above 700°C when present in the form of gypsum
B: Provides adequate strength to the investment, holds ingredients together and provides rigidity
Answer: B: Provides adequate strength to the investment, holds ingredients together and provides rigidity 
Explanation: None