Question

Macrophages

 A. carry class II major histocompatibility complex (MHC) antigens on their plasma membrane. B. secrete tumour necrosis factor (TNF).

 C. are activated by interferon-gamma (IFN-γ). 

D. are antigen presenting cells. 

E. secrete IgG.

Answer 1

Macrophages do not secrete IgG antibodies. The IgG antibodies are secreted by the B cells. Hence the option (E) is incorrect and does not describe the macrophage.