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
[{'content': 'All are constituents of soda lime except – \nSelect and explain. \nA. Ca(OH)2, B. Ba(OH)2, C. Silica, D. Moisture', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Sodalime contains Ca(OH)2 (94%), NaOH (5%), KOH (< 1%), Silica, indicator and moisture.', 'role': 'assistant'}]