This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Immunity, Subject name: Pathology
[{'content': 'Lymphocyte phenotype test done for? \nSelect and explain. \nA. Agammaglobinemia, B. SCID, C. Sepsis, D. Acute leukemia', 'role': 'user'}, {'content': "Answer: B \nExplanation: Ans. (b) SCID(Ref: HENRY'S Clinical Diagnosis and Management by Laboratory Methods; 22ned ed/ pg 944-945)Lymphocyte phenotyping for assessing immune deficiency includes CD3 (pan T cell), CD4 (T helper subset), CD8 (T cytotoxic/suppressor subset), CD 19 (pan B cell), CD 16/56 (pan NK cell) and other cell surface markers as required based on clinical data. This analysis is indicated in diagnosis and monitoring of immunodeficiencies and immunotherapy in children and adults", 'role': 'assistant'}]