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': 'First implant system developed? \nSelect and explain. \nA. Noble biocare - Branemark, B. Noble biocare - Steri Oss, C. ITI - Strauman, D. Astra', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]