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: Pathology
Decrease in osmotic fragility cause hemolysis in ? 
Select and explain. 
A. Thalassemia, B. fl-Thalassemia, C. Sickle cell anemia, D. Methhemoglobinemia
B: fl-Thalassemia
Answer: B: fl-Thalassemia 
Explanation: Ans. is 'b' i.e., (3-Thalassemia