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
Tonsils are absent in: 
Select and explain. 
A. Wiskott-Aldrich syndrome, B. DiGeorge syndrome, C. X linked agammaglobulinemia, D. Chediak Higashi syndrome
C: X linked agammaglobulinemia
Answer: C: X linked agammaglobulinemia 
Explanation: Tonsils are absent in X linked agammaglobulinemia