Answer:
1- 1st stage
2- 3rd stage
3- 2nd stage
4- 4th stage
Step-by-step explanation:
The immunological response of the body against a pathogen takes place at both the cellular and humoral level. When a pathogen enters the body, the innate immunity produces the response against the pathogen. Later the adaptive immunity comes into action which is adaptive against the pathogen.
When a pathogen enters the human, they replicate in the humans which increases their number.
The innate immunity comes into action and the pathogen is lysed by the antigen-presenting cells. The antigen-presenting cells then interact with the T helper cells of the body which activates the humoral or cellular mode of immune response and tries to clear the infective agents.
The immunological response then tries to form a memory of the infection by forming memory cells. The antigen when gets cleared off and level reaches below the threshold the memory cells then provides the last protection.
Thus, the sequence of option is correct.