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
In an ideal restoration, gingival margin should be: 
Select and explain. 
A. Below contact point but 1mm occlusal to gingival crest, B. Below contact point but at level of gingival crest, C. Below gingival crest, D. At contact point
A: Below contact point but 1mm occlusal to gingival crest
Answer: A: Below contact point but 1mm occlusal to gingival crest 
Explanation: None