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: Pathology
[{'content': 'In wiskott - Aldrich syndrome true is \nSelect and explain. \nA. Raised IgE, B. Raised IgM, C. Reduced IgA, D. CD4 and CD8 defect', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]