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
[{'content': "Disorder of T cell is \nSelect and explain. \nA. Bruton disease, B. Purine nucleoside phosphorylase (PNP) deficiency, C. Chediak-Higashi Syndrome, D. Job's Syndrome", 'role': 'user'}, {'content': 'Answer: B \nExplanation: PNP deficiency is autosomal recessive disorder\nT cell defect.', 'role': 'assistant'}]