Question

For a T-cell to recognize an antigen, it must interact with

• A. complement
• B. a macrophage
• C. a B-cell
• D. all of these

Answer 1

Answer: (B)

a macrophage

T cells must be activated by interacting with a professional APC presenting an antigen with their T cell receptor recognizes before they can divide and perform their function. For this, they must interact with a macrophage.

So, the correct option is 'A macrophage'.