Serological testing is based on the fact that: select one:
a. all bacteria have the same antigens.
b. antibodies react specifically with an antigen.
c. the human body makes antibodies against bacteria.
d. antibodies cause the formation of antigens.
e. bacteria clump together when mixed with any antibodies.

B. Antibodies react specifically with an antigen.

Explanation:

Serological tests are blood tests that look for antibodies in your blood. They can involve a number of laboratory techniques. Flucculation tests are based on the precipitation that takes place when antibody and specially prepared antigens are mixed together

Liver- a vital organ only found in vertebrates which detoxifies various metabolites, synthesizes proteins and produces biochemicals necessary for digestion and growth. In humans, it is located in the right upper quadrant of the abdomen, below the diaphragm.