The following are multiple choice questions (with answers) about medical knowledge.   **Question:** Ludwig's angina is characterized by   (A) Raised tongue   (B) Elevation of ear lobe   (C) Trismus   (D) Unilateral swelling
['(A) Raised tongue <> answer', 'The following are multiple choice questions (with answers) about medical knowledge. <> instruction', '(A) Raised tongue \n (B) Elevation of ear lobe \n (C) Trismus \n (D) Unilateral swelling <> possible answers', "  Ludwig's angina is characterized by <> context@"]