This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Kidney, Subject name: Pediatrics
[{'content': 'Which of the following is/are not the features of Henoch-Schonlein purpura (HSP)? \nSelect and explain. \nA. Abdominal pain, B. Splinter hemorrhage, C. Thrombocytopenia, D. Epistaxis', 'role': 'user'}, {'content': "Answer: C \nExplanation: c. Thrombocytopenia(Ref: Nelson's 20/e p 1612, Ghai 8/e p 632)HSP is characterized by a tetrad of palpable purpura, arthritis, glomerulonephritis and abdominal painLess common skin lesions are macules, vesicles, bullous lesions, splinter hemorrhage and ulcerations; Rarely, epistaxis may occur.", 'role': 'assistant'}]