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
Finish lines of a complete coverage crown should lie 
Select and explain. 
A. Supragingivally, B. Subgingivally, C. Subgingival if required, D. Gingival margin
C: Subgingival if required
Answer: C: Subgingival if required 
Explanation: None