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
Implant predictability regarding occlusion is lowest for which patient? 
Select and explain. 
A. Edentulous patient, B. Partly edentulous patient, C. Both of the above, D. None
A: Edentulous patient
Answer: A: Edentulous patient 
Explanation: None