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': 'Syneresis is associated with \nSelect and explain. \nA. Hydrocolloids, B. Elastomers, C. Zinc oxide eugenol, D. Plaster of paris', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]