Which of the following antibodies is primarily produced during the primary immune response?

Which cells are responsible for the production of antibodies?

Read the given statements carefully and identify the incorrect statements.
$(1)$ In active acquired immunity,antibodies are directly injected into the body.
$(2)$ Vaccination is considered under passive acquired immunity.
$(3)$ The human body distinguishes between self and non-self with the help of $Tc$ cells.
$(4)$ Innate immunity consists of four types of barriers.

Which of the following statements is false?

What does $CMI$ stand for?

When a person produces antibodies in response to a pathogen entering the body,this type of immunity is called ..........