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
A 21 year old male presents with anemia and mild hepatosplenomegaly. His hemoglobin is 5 gm/dit, history of single blood transfusion is present till date. Most probable diagnosis is - 
Select and explain. 
A. Thalassemia major, B. Thalassemia minor, C. Thalassemia intermedia, D. Autoimmune hemolytic anemia
D: Autoimmune hemolytic anemia
Answer: D: Autoimmune hemolytic anemia 
Explanation: None