This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Primary Immunodeficiency, Subject name: Pediatrics
[{'content': "Which of the following is not found in DiGeorge's syndrome? \nSelect and explain. \nA. Tetany, B. Eczema, C. Mucocutaneous candidiasis, D. Absence of T cells", 'role': 'user'}, {'content': 'Answer: B \nExplanation: Disease Primary defect Secondary defect DiGeorge Syndrome (Thymic Hypoplasia) 22q11 deletion Failure of development of 3rd & 4th pharyngeal pouches T-cell defect Tetany Congenital defects of hea and great vessels Mucocutaneous candidiasis', 'role': 'assistant'}]