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
Which of the following DMARDs require liver function testing? 
Select and explain. 
A. Methotrexate, B. Infliximab, C. Abatacept, D. Cyclophosphamide
A: Methotrexate
Answer: A: Methotrexate 
Explanation: Methotrexate can lead to hepatotoxicity and therefore require regular liver function assessment.