This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Primary Immunodeficiency, Subject name: Pediatrics
[{'content': 'Tonsils are absent in: \nSelect and explain. \nA. Wiskott-Aldrich syndrome, B. DiGeorge syndrome, C. X linked agammaglobulinemia, D. Chediak Higashi syndrome', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Tonsils are absent in X linked agammaglobulinemia', 'role': 'assistant'}]