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: Pathology
[{'content': 'Decreased T cell immunity is a feature of ? \nSelect and explain. \nA. Digeorge syndrome, B. Hyper IgM syndrome, C. Severe congenital neutropenia, D. Chronic granulomatous diseas', 'role': 'user'}, {'content': "Answer: A \nExplanation: Ans. is 'a' i.e., Di George syndrome Classification of Primary Immune Deficiency Diseases Deficiencies of the Innate Immune System Phagocytic cells Impaired production severe congenital neutropenia (SCN) Asplenia Impaired adhesion leukocyte adhesion deficiency (LAD) Impaired killing; chronic granulomatous disease (CGD) Innate immunity receptors and signal transduction Defects in Toll-like receptor signaling Mendelian susceptibility to mycobacterial disease Complement deficiencies Classical, alternative, and lectin pathways Lytic phase", 'role': 'assistant'}]