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
Chronic non- spherocytic hemolytic anemia comes under which class of G6PD deficiency? 
Select and explain. 
A. Class I, B. Class II, C. Class III, D. Class IV
A: Class I
Answer: A: Class I 
Explanation: Class I - severely G6PD deficient associated with chronic non - spherocytic hemolytic anemia.