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': 'Serial extraction should not be undertaken if there is \nSelect and explain. \nA. Crowding, B. Presence of ectopic eruption, C. Deep bite or open bite, D. None of these', 'role': 'user'}, {'content': 'Answer: C \nExplanation: None', 'role': 'assistant'}]