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
Treatment for pulp less young tooth is 
Select and explain. 
A. Apexogenesis, B. Apexification, C. Pulpotomy, D. Mummification
B: Apexification
Answer: B: Apexification 
Explanation: None