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 cavosurface gingival bevel for a class II cast gold inlay preparation should be 
Select and explain. 
A. 0.5 to 1 mm wide and blend with secondary lingual flare, B. 0.2 to 0.3 mm wide and blend with secondary lingual flare, C. 0.2 mm wide and blend with secondary lingual flare, D. 3 to 4 mm wide and blend with secondary lingual flare
A: 0.5 to 1 mm wide and blend with secondary lingual flare
Answer: A: 0.5 to 1 mm wide and blend with secondary lingual flare 
Explanation: The gingival bevel should be 0.5 to 1 mm wide and should blend with the lingual secondary flare.
Sturdevant Operative Dentistry 7th edition page. e105