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: Surgery
Splenectomy is least useful in - 
Select and explain. 
A. Congenital elliptocytosis, B. Thalasemia major, C. Congenital spherocytic anaemia, D. Hereditary nonspherocytic haemolytic anaemia
B: Thalasemia major
Answer: B: Thalasemia major 
Explanation: Ans. is 'b' i.e., Thalasemia major