This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Haematology, Subject name: Anatomy
[{'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: Ref Robbins 9/e p526_527 ;8/e p666;7/e p986-987 All other options have decreased platelet count except henoch schonlein purpura .though it has the name purpura ,but the platelet count in this condition is normal.The skin manifestations in HSP are due to small vessel vasculitis', 'role': 'assistant'}]