The regions of an antibody that make it distinct from all other kinds of antibodies, are its

All antibodies are

The region of antibody that recognises the antigen is called :-

A flexible region in antibody is

Most of antibodies are obtained from

Crystallisable region of antibody is

Of the following about antibodies and antigens , choose the correct set I. An antibody consisits of four identical light (L) chains and two identical heavy (H) chains II. The stem of Y of antibody is called Fab fragment. III. The stem of antibody and lower parts of its arms constitute constant (C) region III. Portion of antigen to which an antibody binds is called epitope