The following are multiple choice questions (with answers) about medical knowledge.   **Question:** Access cavity of mandibular 1st molar is:   (A) Oval   (B) Rounded triangle   (C) Rhomboid   (D) None of the above
['(B) Rounded triangle <> answer', 'The following are multiple choice questions (with answers) about medical knowledge. <> instruction', '(A) Oval \n (B) Rounded triangle \n (C) Rhomboid \n (D) None of the above <> possible answers', '  Access cavity of mandibular 1st molar is: <> context@']