input: The following are multiple choice questions (with answers) about medical knowledge.   **Question:** Acid dissolution is most common in which part of rod   (A) Periphery of head   (B) Head region   (C) Rod tails   (D) equally
output: ['(B) Head region <> answer', 'The following are multiple choice questions (with answers) about medical knowledge. <> instruction', '(A) Periphery of head  (B) Head region  (C) Rod tails  (D) equally <> possible answers', '  Acid dissolution is most common in which part of rod <> context']