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
Obturation may be done in the initial visit if 
Select and explain. 
A. There is necrotic pulp, B. There is a swelling, C. The tooth is vital, D. The tooth is nonvital
C: The tooth is vital
Answer: C: The tooth is vital 
Explanation: None