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
Guiding plane in RPD should be located at: 
Select and explain. 
A. In between edentulous space, B. Abutment surface adjacent to an edentulous area, C. Edentulous areas, D. Abutment area
B: Abutment surface adjacent to an edentulous area
Answer: B: Abutment surface adjacent to an edentulous area 
Explanation: None