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': 'Type I and type II zinc oxide impression paste\ndiffer with respect to \nSelect and explain. \nA. Their use, B. Their hardness after setting, C. Water content, D. Eugenol content', 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]