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
All the following are the indicators for single visit endodontics EXCEPT 
Select and explain. 
A. Acute inflammation of the periapex, B. Nonvital teeth with sinus tract, C. Vital tooth, D. Fractured tooth
A: Acute inflammation of the periapex
Answer: A: Acute inflammation of the periapex 
Explanation: None