input: The following are multiple choice questions (with answers) about medical knowledge.   **Question:** An apical radiolucent area present in central incisor after 4 months of RCT is due to:   (A) Inadequate obturation & leakage from main canal   (B) Leakage from accessory canal   (C) Leakage from gingival crevice   (D) Leakage from access opening
output: ['(A) Inadequate obturation & leakage from main canal <> answer', 'The following are multiple choice questions (with answers) about medical knowledge. <> instruction', '(A) Inadequate obturation & leakage from main canal  (B) Leakage from accessory canal  (C) Leakage from gingival crevice  (D) Leakage from access opening <> possible answers', '  An apical radiolucent area present in central incisor\nafter 4 months of RCT is due to: <> context']