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
Conversion of T4 to T3 inhibition is associated with: 
Select and explain. 
A. Propylthiouracil, B. Ampicillin, C. Lithium, D. Carbimazole
A: Propylthiouracil
Answer: A: Propylthiouracil 
Explanation: None