This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Chemotherapy, Subject name: Pharmacology
Which of the following antitubercular drugs is associated with hypothyroidism? 
Select and explain. 
A. Rifampicin, B. Pyrazinamide, C. Ethionamide, D. Streptomycin
C: Ethionamide
Answer: C: Ethionamide 
Explanation: ethionamide is structurally similar to methimazole that has been shown to inhibit thyroid hormone synthesis hence causing hypothyroidism