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': 'When working with condensation silicone impression material, it is advisable to pour the cast \nSelect and explain. \nA. Immediately, B. After 1 hour, C. After 4 hours, D. After 24 hours', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]