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
First implant system developed? 
Select and explain. 
A. Noble biocare - Branemark, B. Noble biocare - Steri Oss, C. ITI - Strauman, D. Astra
A: Noble biocare - Branemark
Answer: A: Noble biocare - Branemark 
Explanation: None