<prompt> Lymphocyte phenotype test done for?AgammaglobinemiaSCIDSepsisAcute leukemia  <response>: Ans. b SCIDRef: HENRYS Clinical Diagnosis and Management by Laboratory Methods; 22ned ed pg 944-945Lymphocyte phenotyping for assessing immune deficiency includes CD3 pan T cell, CD4 T helper subset, CD8 T cytotoxicsuppressor subset, CD 19 pan B cell, CD 1656 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 