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
Drugs to be avoided in G6PD deficiency is ? 
Select and explain. 
A. Dapsone, B. Metformin, C. Pregabalin, D. Rituximab
A: Dapsone
Answer: A: Dapsone 
Explanation: Ans. is 'a' i.e., Dapsone Drugs causing hemolytic Anaemia in C-6-PD Aminosalicylic acid Antimalarials - Primaquine, Quinine Analgesics - Aspirin, Acetanilid Chloramphenicol Cotrimoxazole Dapsone deficiency Nalidixic acid o Nitrofurantoin Phenacetin Probenecid Procainamide Quinidine Sulfonamides (Sulfamethoxazole) Vitamin C Vitamin K (water soluble form) Methylene blue Niridazole - Phenazopyridine Doxorubicin