This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Surgery
Iodine deficiency or goitrogenic drugs administered over a long period may produce: 
Select and explain. 
A. Follicular carcinoma., B. Medullary carcinoma., C. Papillary carcinoma., D. Anaplastic carcinoma.
C: Papillary carcinoma.
Answer: C: Papillary carcinoma. 
Explanation: None