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: Microbiology
Nucleotidase deficiency - 
Select and explain. 
A. Humoral immunity deficiency, B. Acquired immunity deficiency, C. SCIDs, D. Cell mediated immunity deficiency
A: Humoral immunity deficiency
Answer: A: Humoral immunity deficiency 
Explanation: None