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: Pharmacology
All are causing hypothyroidism except: 
Select and explain. 
A. PAS, B. Captopril, C. Lithium, D. Amiodarone
B: Captopril
Answer: B: Captopril 
Explanation: None