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': 'Change in color of traumatized tooth is evident in \nSelect and explain. \nA. 1 to 2 weeks after injury, B. 2 to 3 weeks after injury, C. 3 to 4 weeks after injury, D. Within few days', 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]