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
Pulp mummification is indicated in: 
Select and explain. 
A. Non-vital tooth, B. Deep caries on a symptomatic vital tooth, C. Traumatic exposure of a vital tooth, D. Traumatic exposure of a vital tooth with open wide apex
C: Traumatic exposure of a vital tooth
Answer: C: Traumatic exposure of a vital tooth 
Explanation: None