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: Social & Preventive Medicine
Which of the following anti leprosy drugs is used in treatment of type 2 lepra reaction: 
Select and explain. 
A. Clofazimine, B. Dapsone, C. Rifampicin, D. None of the above
A: Clofazimine
Answer: A: Clofazimine 
Explanation: Clofazimine is also effective for Type 2 reaction but is less potent than coicosteroids and often takes 4-6 weeks to develop its full effects, so it should never be staed as the sole agent for the treatment of recurrent Type 2 reaction. However, clofazimine may be extremely useful for reducing or withdrawing coicosteroids in patients who have become dependent on them. Ref: