Certain proteases have the ability to cleave IgG molecules into fragments.$$ Which statement is NOT true with respect to these immunoglobulin fragments?

Group of answer choices

Fab fragments have the ability to bind antigen

The antigen binding portion of the Fab fragment is encoded by variable region gene sequences

The Fc fragment contains binding sites for classical complement pathway proteins and for Fc receptors

The Fc fragment contains an antigen binding site encoded by variable region gene sequences

Fab fragments are composed of a light chain and a portion of the heavy chain