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
Loading dose of leflunomide in rheumatoid arthritis is : 
Select and explain. 
A. 20 mg, B. 10 mg, C. 100 mg, D. 400 mg
C: 100 mg
Answer: C: 100 mg 
Explanation: None