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
In primary immune deficiency, the fraction of plasma protein reduced is 
Select and explain. 
A. α-1-globulin, B. α-2-globulin, C. β-globulin, D. γ-globulin
D: γ-globulin
Answer: D: γ-globulin 
Explanation: None