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': 'All are true about Wiskott-Aldrich syndrome except : \nSelect and explain. \nA. Bloody diarrhea during infancy, B. Low IgM and elevated IgA and IgE, C. Large size platelets, D. Atopic dermatitis', 'role': 'user'}, {'content': 'Answer: C \nExplanation: None', 'role': 'assistant'}]