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: Physiology
Hyperthyroidism can be caused by 
Select and explain. 
A. Clonidine, B. Amiodarone, C. Hydralazine, D. Penicillamine
B: Amiodarone
Answer: B: Amiodarone 
Explanation: None