Fact 1: Antibodies are large, Y-shaped proteins that recognize and bind to antigens.

Fact 2: ALL immunogens are antigens.

Given the two facts above, answer the question "Antibodies are large, Y-shaped proteins that recognize and bind to:" with the following options: 
- humans
 - A Greek letter
 - bones
 - the skin
 - animals
 - inorganic items
 - immunogens
 - water


 

       immunogens  