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: Skin
Which of the following is not used in lepra reaction? 
Select and explain. 
A. Chloroquin, B. Rifampicin, C. Clofazimine, D. Thalidomide
B: Rifampicin
Answer: B: Rifampicin 
Explanation: Rifampicin REF: Rook's 7' ed p. 29.1-29.14 Treatment of lepra reactions according to severity Type 1 Type 2 Mild NSAIDS NSAIDS Moderate Nsaids , Coicosteroids NSAIDS , Clofazimine, Thalidomide, Chloroquine Severe NSAIDS . Coicosteroids Thalidomide , Coicosteroids , Parenteral antimony