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: Medicine
[{'content': 'The drug with definite risk of hemolysis in patients with G6PD deficiency is: \nSelect and explain. \nA. Cotrimoxazole, B. Chloroquine, C. Sulfasalazine, D. Quinine', 'role': 'user'}, {'content': 'Answer: A \nExplanation: All the choices have risk of clinical hemolysis in G6PD. Definite risk is seen with Cotrimoxazole only, Others have either possible or doubtful risk. Ref: Harrison 18th edition, Page 879.', 'role': 'assistant'}]