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
Remaining bone associated with implant papillary level of single tooth implant is denoted by? 
Select and explain. 
A. Bone level surrounding adjacent natural bone height, B. 5 mm of implant abutment junction, C. 5 mm of implant bone level, D. According to bone height of implant
A: Bone level surrounding adjacent natural bone height
Answer: A: Bone level surrounding adjacent natural bone height 
Explanation: None