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 hydrocolloid is more flexible, that it can be distorted easily? 
Select and explain. 
A. Alginate, B. Agar, C. Polysulphide, D. None of the above
A: Alginate
Answer: A: Alginate 
Explanation: Typical Properties of Alginate and Heavy-Bodied Agar Hydrocolloid Impression Materials: