input: The following are multiple choice questions (with answers) about medical knowledge.   **Question:** A 35-year-old woman presents to the office because she has felt a small painless mass in her neck which has been slowly growing. She has no relevant past medical history. Her vital signs are within normal limits. On physical exam of the thyroid gland, a solitary nodule is palpated. It is fixed to the surrounding tissues and nontender. TSH is normal, and antithyroid antibodies are negative. Which of the following is the most likely cause of this patient’s symptoms?   (A) Endemic goiter   (B) Follicular carcinoma   (C) Hashimoto thyroiditis   (D) Papillary carcinoma
output: ['(D) Papillary carcinoma <> answer', 'The following are multiple choice questions (with answers) about medical knowledge. <> instruction', '(A) Endemic goiter  (B) Follicular carcinoma  (C) Hashimoto thyroiditis  (D) Papillary carcinoma <> possible answers', '  A 35-year-old woman presents to the office because she has felt a small painless mass in her neck which has been slowly growing. She has no relevant past medical history. Her vital signs are within normal limits. On physical exam of the thyroid gland, a solitary nodule is palpated. It is fixed to the surrounding tissues and nontender. TSH is normal, and antithyroid antibodies are negative. Which of the following is the most likely cause of this patient’s symptoms? <> context']