Helper cells belong to?: (A) T cells, (B) Macrophages, (C) B cells, (D) Monocytes
Answer is A. The category of effector T cell is a broad one that includes various T cell types that actively respond to a stimulus, such as co-stimulation. This includes helper, killer, regulatory, and potentially other T cell types. Reff: Ananthanarayanan & panikers textbook of microbiology 9th edition pg:135