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: Pediatrics
[{'content': "A child with an obvious rash presents with recurrent infections. The investigation revealed decreased platelet count and reduced IgM.  Which of the following is the most likely diagnosis – \nSelect and explain. \nA. Idiopathic Thrombocytopenic Purpura, B. Thrombotic Thrombocytopenic Purpura, C. Wiskott–Aldrich Syndrome, D. Di' George anomaly", 'role': 'user'}, {'content': 'Answer: C \nExplanation: The classical triad of rash, thrombocytopenia and recurrent infection (immunodeficiency; ↓-IgM) suggest a diagnosis of Wiskott-Aldrich Syndrome.', 'role': 'assistant'}]