This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Anti Thyroid, Subject name: Pharmacology
All of the following are rare but life-threatening adverse effects of thioamide group of anti-thyroid drugs except: 
Select and explain. 
A. Agranulocytosis, B. Aplasia anemia, C. Liver toxicity, D. Lung fibrosis
D: Lung fibrosis
Answer: D: Lung fibrosis 
Explanation: Ans. (D) Lung fibrosis(Ref: KDT 8th/275-276)Thioamides include drugs like methimazole, carbimazole and propylthiouracil.Agranulocytosis and aplastic anemia is serious side effect of all of these drugs but it is seen rarely.Propylthiouracil is associated with hepatotoxicity.All the 3 drugs are teratogenic. Least teratogenic is propylthiouracil.