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
The following disease without splenomegaly for which splenectomy is effective - 
Select and explain. 
A. Sickle cell disease, B. Idiopathic thrombocytopenic purpura, C. Aplastic anaemia, D. Thalassemia
B: Idiopathic thrombocytopenic purpura
Answer: B: Idiopathic thrombocytopenic purpura 
Explanation: None