This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Adverse Drug Effect, Subject name: Pharmacology
Which of the following drug can casue thyroid dysfunction? 
Select and explain. 
A. Amiodarone, B. Ampicillin, C. Ibutilide, D. Acyclovir
A: Amiodarone
Answer: A: Amiodarone 
Explanation: Ans. is 'a' i.e., Amiodarone Drugs causing hypothyroidism -o Lithiumo Sulfonamideo Phenobarbitoneo Phenytoino Amiodaroneo Paraminosalycylie acid (PAS)o Rifampicino Carbamazepine