Which cells are responsible for cell-mediated immunity?

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 provides passive immunity?

Which of the following components is not included as an antibody?

The toxic substances produced by foreign bodies that trigger an immune response are known as:

Lymphocytes mature in the.........