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': 'Which of the following is true about flexibility of hydrocolloids? \nSelect and explain. \nA. Agar is more flexible then alginate, B. Alginate is more flexible than agar, C. Both have equal flexibility, D. None of the above', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Typical Properties of Alginate and Heavy-Bodied Agar Hydrocolloid Impression Materials', 'role': 'assistant'}]