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
A traumatized tooth nonvital with or without crown
fracture is classified as 
Select and explain. 
A. Class-III, B. Class-IV, C. Class -V, D. Class-VII
B: Class-IV
Answer: B: Class-IV 
Explanation: None