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
The current bar clasp design used is: 
Select and explain. 
A. Mesio-occlusal rest, B. Disto-occlusal rest, C. Mesial or distal depending on the situation, D. Choice of the dentist
A: Mesio-occlusal rest
Answer: A: Mesio-occlusal rest 
Explanation: None