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 that carry definitive risk of clinical hemolysis in patients with G 6 PD deficiency are all except? 
Select and explain. 
A. Primaquine, B. Chloroquine, C. Dapsone, D. Nalidixic acid
B: Chloroquine
Answer: B: Chloroquine 
Explanation: Ans. is 'b' i.e., Chloroquine