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 is the method of treating internal resorption: 
Select and explain. 
A. Extirpation of pulp and calcium hydroxide dressing, B. b)	Extirpation of pulp and formocresol dressing, C. c)	Pulpotomy, D. Pulp capping
A: Extirpation of pulp and calcium hydroxide dressing
Answer: A: Extirpation of pulp and calcium hydroxide dressing 
Explanation: None