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
Barbed broach is used for: 
Select and explain. 
A. Extirpation of pulp, B. Enlargement of canal, C. Obturation of canals, D. All of the above
A: Extirpation of pulp
Answer: A: Extirpation of pulp 
Explanation: None