This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Platelet, Subject name: Pathology
[{'content': 'Normal platelet count is found in: \nSelect and explain. \nA. Wiskott Aldrich syndrome, B. Henoch Schonlein purpura, C. Immune thrombocytopenia, D. Dengue fever', 'role': 'user'}, {'content': 'Answer: B \nExplanation: All other options have decreased platelet count except Henoch Schonlein purpura. Henoch-Schonlein purpura is a systemic syndrome involving the skin (purpuric rash), gastrointestinal tract (abdominal pain), and joints (ahritis). skin manifestations in HSP are due to small vessel vasculitis and platelet count is normal. Wiskott-Aldrich syndrome is an X-linked disease characterized by thrombocytopenia, eczema, and a marked vulnerability to recurrent infection that results in early death. The platelets are small and are reduced in number .', 'role': 'assistant'}]