Final answer:
CD8 T cells, known as cytotoxic T cells, produce IFN-gamma, which helps in the body's immune defense.
Step-by-step explanation:
CD8 T cells, also known as cytotoxic T cells, are primarily responsible for killing infected cells. These cells are characterized by the expression of CD8 on their surface and interact with the MHC I-epitope complex on infected cells. Among the list of cytokines provided, CD8 T cells are known to produce IFN-gamma (Interferon-gamma), which plays a critical role in immune defense. While CD8 T cells do release other substances, such as granzymes and perforins, which are involved in the destruction of infected cells, IFN-gamma is the cytokine that they are well-recognized for producing.