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
[{'content': 'Which one of the following is false about scwachman - diamond syndrome \nSelect and explain. \nA. Bleeding is most common early symptom, B. Splenomegaly, C. Infections, D. Hypocellular bone marrow', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Splenomegaly absent in scwachman diamond syndrome.', 'role': 'assistant'}]