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
Disorder of T cell is 
Select and explain. 
A. Bruton disease, B. Purine nucleoside phosphorylase (PNP) deficiency, C. Chediak-Higashi Syndrome, D. Job's Syndrome
B: Purine nucleoside phosphorylase (PNP) deficiency
Answer: B: Purine nucleoside phosphorylase (PNP) deficiency 
Explanation: PNP deficiency is autosomal recessive disorder
T cell defect.