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 constituent of reversible hydrocolloid is present in highest amount by weight percent 
Select and explain. 
A. Water, B. Agar, C. Potassium, D. Sodium
B: Agar
Answer: B: Agar 
Explanation: None