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
Which of the following structures is not found in a living pulp? 
Select and explain. 
A. Collagen fibres, B. Haversian fibres, C. Non-myelinated nerve fibres, D. Reticulum
B: Haversian fibres
Answer: B: Haversian fibres 
Explanation: None