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
Which of the following is true about flexibility of hydrocolloids? 
Select and explain. 
A. Agar is more flexible then alginate, B. Alginate is more flexible than agar, C. Both have equal flexibility, D. None of the above
B: Alginate is more flexible than agar
Answer: B: Alginate is more flexible than agar 
Explanation: Typical Properties of Alginate and Heavy-Bodied Agar Hydrocolloid Impression Materials