This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Anti Microbial, Subject name: Pharmacology
[{'content': 'Most common drug used in Leprosy is: \nSelect and explain. \nA. Dapsone, B. Clofazimine, C. Ethionamide, D. Ofloxacin', 'role': 'user'}, {'content': 'Answer: A \nExplanation: (Dapsone): Ref 709-KDT (752-KDT 6th)Classification of antileprotic drugs1. Sulfone - Dapsone - (DPS)2. Phenazine derivative - clofazimine3. Antitubercular drugs - Rifampin, Ethionamide4. Other antibiotics - Ofloxacin, Minocycline, clarithromycinDAPSONE: - Inhibition of PABA incorporation in to folic acid.* Simplest, oldest, cheapest, most active and most commonly used in leprosy..* RIFAMPIN: - Most important Bactericidial drug in leprosy* Clofazimine: - Dye with leprostatic and anti-inflammatory properties', 'role': 'assistant'}]