This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Social science, Mental health & Genetics, Subject name: Social & Preventive Medicine
[{'content': 'IQ of a normal person is \nSelect and explain. \nA. 70-79, B. 80-89, C. 90-109, D. 110-119', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Idiot: 0-24Imbecile: 25-49Moron: 50-69Borderline: 70-79Low normal: 80-89Normal: 90-109Superior: 110-119Very superior 120-139Near genius 140 and over Park 23e pg: 679', 'role': 'assistant'}]