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': "Which of the following aren't included in the WHO classification of operating dental auxiliaries? \nSelect and explain. \nA. Dental hygienist, B. School dental nurses, C. Therapists, D. Denturists", 'role': 'user'}, {'content': 'Answer: D \nExplanation: Non-operating auxiliaries\n\nDental surgery assistant\nDental secretary/receptionist\nDental laboratory technician\nDental health educator\n\nOperating auxiliaries\n\nSchool dental nurse\nDental therapist\nDental hygienist\nExpanded function dental auxiliaries\n\nEssentials of preventive and community dentistry\xa0\nSoben Peter\xa0\n5th edition', 'role': 'assistant'}]