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
For a class V cavity for amalgam: 
Select and explain. 
A. Mesio-distal walls are parallel and occluso-gingival walls converging, B. Mesio-distal walls diverging, occlusogingival walls converging, C. MD walls diverging, OG walls diverging, D. MD walls and OG walls parallel
C: MD walls diverging, OG walls diverging
Answer: C: MD walls diverging, OG walls diverging 
Explanation: None