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': 'GLUMA is : \nSelect and explain. \nA. 5% glutaraldehyde + 35% HEMA, B. 5% glutaraldehyde + 35% META, C. 5% glutaraldehyde + 40% HEMA, D. 5% glutaraldehyde + 40% META', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Gluma system (Bayer Dental, Leverkusen, Germany) - primer solution of 5% glutaraldehyde and 35% HEMA in water.\nSturdevant Operative Dentistry 7th edition page 143', 'role': 'assistant'}]