Which of the Following Statements About Helper T Cells Is

Multiple Choice

Which of the following statements about helper T cells is incorrect?

A) They can be distinguished from other T lymphocytes by the presence of certain glycoproteins.
B) They function in conjunction with B cells.
C) They secrete messenger proteins called perforins.
D) There are two types: TH1 and TH2.
E) They are destroyed in HIV- infected individuals.