Which of the following is not true for antibodies?
a. they are proteins
b. they are produced in response to the presence of an antigen
c. they are capable of interacting with several antigens
d. they are abbreviated as lg
e. they are present in blood and body secretions

c. they are capable of interacting with several antigens

Explanation:

Antibodies, also called immunoglobulins (Ig), are protein structures found in blood plasma. They act against invading organisms in the body, such as bacteria and viruses. The main function of antibodies is the body's defense, which act directly against invading microorganisms (also called antigens) that can cause various infections and diseases. In this way they neutralize the toxins of extracellular parasites.

Antibodies are produced by B lymphocytes and have the ability to specifically combine with substances foreign to the body, inactivating them. Antigens are extremely specific, so we can say that for each of their types there is a type of antibody, complementary to that of the antigen. Thus, antibodies are not able to interact with various antigens, but only those with which they establish a specific relationship.

not sure if this is what you'r looking for eubacteria and archaebacteria