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
Impression plaster is 
Select and explain. 
A. Hydrophobic, B. Hydrophilic, C. Not compatible in wet sulcus, D. Highly viscous
B: Hydrophilic
Answer: B: Hydrophilic 
Explanation: None