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
Which direct retainer is indicated in the case of an isolated, mesially inclined molar? 
Select and explain. 
A. 1/2 and 1/2 clasp, B. Ring clasp, C. Bar clasp, D. C-clasp
B: Ring clasp
Answer: B: Ring clasp 
Explanation: None