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: Anaesthesia
Water is used for hardening in - 
Select and explain. 
A. Sodalime, B. Baralime, C. Both, D. None
B: Baralime
Answer: B: Baralime 
Explanation: Water of crystallization is used in Baralime and silica is used in sodalime