This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Unknown
Which of the follow ing interleukin is secreted by T helper 2 cells - 
Select and explain. 
A. IL 11, B. IL7, C. IL l, D. IL13
D: IL13
Answer: D: IL13 
Explanation: Ans. is 'd' i.e. IL 13 T helper -1 (TH1) secretes - 1L-2 and interferon - gT helper - 2 (TH2) secretes - IL-4, IL-5, IL-6, IL-13.