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': 'During eruption of lower lateral incisors left primary\ncanine is prematurely exfoliated \nSelect and explain. \nA. Extraction of right primary canine to prevent midline shift, B. No treatment periodic observation only, C. Move the left permanent Lateral incisors towards midline, D. Move right permanent Lateral incisor towards midline', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]