input: The following are multiple choice questions (with answers) about medical knowledge.   **Question:** On radiograph of upper lateral incisor a periapical lesion is found after 2 years following RCT curretage was done and histopathology showed presence of apical cyst. Lesion continued to enlarge even after surgery, What is the reason for this.   (A) Leaking from main canal   (B) Unobturated accessory canal   (C) Apex was not resected   (D) Actinomycoses infection
output: ['(A) Leaking from main canal <> answer', 'The following are multiple choice questions (with answers) about medical knowledge. <> instruction', '(A) Leaking from main canal  (B) Unobturated accessory canal  (C) Apex was not resected  (D) Actinomycoses infection <> possible answers', '  On radiograph of upper lateral incisor a periapical lesion is found after 2 years following RCT curretage was done and histopathology showed presence of apical cyst. Lesion continued to enlarge even after surgery, What is the reason for this. <> context']