The following are multiple choice questions (with answers) about medical knowledge.   **Question:** An empty cavity in the mandible with no lining is mostly likely to be:   (A) Aneurysmal bone cyst   (B) Idiopathic bone cavity   (C) Dentigerous cyst   (D) Keratocyst
['(B) Idiopathic bone cavity <> answer', 'The following are multiple choice questions (with answers) about medical knowledge. <> instruction', '(A) Aneurysmal bone cyst \n (B) Idiopathic bone cavity \n (C) Dentigerous cyst \n (D) Keratocyst <> possible answers', '  An empty cavity in the mandible with no lining is\nmostly likely to be: <> context@']