The following are multiple choice questions (with answers) about medical knowledge.   **Question:** The most common curvature of the palatal root of maxillary first molar is:   (A) Facial   (B) Lingual   (C) Distal   (D) Mesial
['(A) Facial <> answer', 'The following are multiple choice questions (with answers) about medical knowledge. <> instruction', '(A) Facial \n (B) Lingual \n (C) Distal \n (D) Mesial <> possible answers', '  The most common curvature of the palatal root of maxillary first molar is: <> context@']