Final answer:
Helper T cells are derived from Common Lymphoid Progenitor (CLP) cells. These lymphoid stem cells migrate to lymphatic tissues for further differentiation and maturation, with T cells maturing in the thymus.
Step-by-step explanation:
Helper T cells (TH) are derived from lymphoid stem cells. These are a class of leukocytes that are part of the immune system, including T cells, B cells, and natural killer (NK) cells. In the process of hemopoiesis (formation of blood cellular components), lymphoid stem cells migrate from the bone marrow to lymphatic tissues such as the lymph nodes, spleen, and thymus, where they continue to differentiate and mature. T cells, including helper T cells, complete their maturation in the thymus. Therefore, the correct answer to the question 'From which of the following stem cells are helper T cells (TH) derived?' is 1) CLP (Common Lymphoid Progenitor).