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
All are true about Wiskott-Aldrich syndrome except : 
Select and explain. 
A. Bloody diarrhea during infancy, B. Low IgM and elevated IgA and IgE, C. Large size platelets, D. Atopic dermatitis
C: Large size platelets
Answer: C: Large size platelets 
Explanation: None