Which type of cells produce an army of proteins to fight against pathogens that have entered our body?

Given below are two statements:
Statement $I:$ Autoimmune disorder is a condition where the body's defense mechanism recognizes its own cells as foreign bodies.
Statement $II:$ Rheumatoid arthritis is a condition where the body does not attack self-cells.
In the light of the above statements,choose the most appropriate answer from the options given below:

Identify the incorrect statement regarding immunity:

Identify the component responsible for the humoral immune response.

Which of the following are primary lymphoid organs?

Recognition and digestion by the phagocytes due to the coated surface of antigens by the antibodies is known as