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
Antithyroid drug contraindicated in pregnancy ? 
Select and explain. 
A. Propylthiouracil, B. 1131, C. Methimazole, D. Carbimazole
B: 1131
Answer: B: 1131 
Explanation: Ans. is'b'i.e., I 131lRef: KDT 7tu/e p. 25Antithyroid treatment contraindicated in pregnancyThyroidectomy and I 131 are contraindicated during pregnancy.