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 statement among the following is false about Hero 642 shaper \nSelect and explain. \nA. Cutting tip, B. Cutting edges, C. Tri helical cross-section/Triangular helix, D. Increased torque resistance', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Majority of NiTI rotary files have non cutting tips with the exception of Quantec SC', 'role': 'assistant'}]