Problem: The V exon encoding the variable region of the heavy chain of antibodies: Group of answer choices Is composed of one V gene segment that is different in different B cell clones Is composed of two different types of gene segments that come together after an antigen-mediated selection process Is composed of three different types of gene segments that randomly come together after a process of gene rearrangement Is composed of a variable number of gene segments that randomly come together after a process of gene rearrangement