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
[{'content': 'What portion of stearic acid does impression compound contains? \nSelect and explain. \nA. 5, B. 10, C. 30, D. 15', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]