Question: The different subpopulations of effector T lymphocytes secrete different cytokines. Which of the following statements is false?: 
 Options:  <1> TH1 lymphocytes secrete IL-3. <2> TH17 lymphocytes secrete IL-6. <3> TH2 lymphocytes secrete IFN-gamma. <4> Cytotoxic T lymphocytes secrete TNFalpha. <5> The regulatory T lymphocytes secrete IL-10.
3