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
In mandibular deciduous tooth with poor prognosis, alveolar
abscess and necrotic pulp, the treatment of choice: 
Select and explain. 
A. Extraction, B. RCT, C. Apicoectomy, D. Drainage of abscess
A: Extraction
Answer: A: Extraction 
Explanation: In mandibular deciduous tooth with poor prognosis, alveolar abscess and necrotic pulp, the treatment of choice is extraction.