Interleukin 2 is produced by: (A) T helper cells 2, (B) Natural killer cells, (C) T helper cells 1, (D) Basophils
Answer is C. A) T helper -1 (TH1) secretes → IL-2 and interferon - γ
B) T helper - 2 (TH2) secretes → IL-4, IL-5, IL-6, IL-13