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
T cell functions are assessed by - 
Select and explain. 
A. phagocyte index, B. T cell count, C. Migration inhibition test, D. Immunoglobin index
C: Migration inhibition test
Answer: C: Migration inhibition test 
Explanation: 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