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': 'Helix in a finger spring for mesial movement lies \nSelect and explain. \nA. Mesial to the tong axis of the tooth, B. Distal to the Long axis of the tooth, C. In line to the long axis of the tooth, D. Perpendicular to the long axis of the tooth', 'role': 'user'}, {'content': 'Answer: C \nExplanation: None', 'role': 'assistant'}]