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': "Which of the following about SCID is false ? \nSelect and explain. \nA. Failure of descent of thymus, B. Peyer's patches are present and normal, C. X-linked type is the most common, D. Gene therapy can be used", 'role': 'user'}, {'content': "Answer: B \nExplanation: Ans. is 'b' i.e., Peyer's patches are present and normal", 'role': 'assistant'}]