This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Immunology, Subject name: Microbiology
[{'content': 'T cell functions are assessed by - \nSelect and explain. \nA. phagocyte index, B. T cell count, C. Migration inhibition test, D. Immunoglobin index', 'role': 'user'}, {'content': "Answer: C \nExplanation: Migration inhibitory factor test an in vitro test for the production of migration inhibitory factor (MIF) by lymphocytes in response to specific antigens; used for evaluation of cell-mediated immunity. MIF production is absent in ceain immunodeficiency disorders, such as wiskott-aldrich syndrome and hodgkin's disease. Called also MIF test. Reff: www.mayoclinic.com", 'role': 'assistant'}]