The following are multiple choice questions (with answers) about medical knowledge.   **Question:** The access cavity for mandibular first molar typically is   (A) Trapezoid   (B) Triangular   (C) Oval   (D) Round
['(A) Trapezoid <> answer', 'The following are multiple choice questions (with answers) about medical knowledge. <> instruction', '(A) Trapezoid \n (B) Triangular \n (C) Oval \n (D) Round <> possible answers', '  The access cavity for mandibular first molar typically is <> context@']