Select the system which is responsible for the protection of the body.

 

Concept: The Immune system could be a complex arrange of cells and proteins that guards the body against contamination. 

The resistant framework keeps a record of each germ (organism) it has ever crushed so it can perceive and crush the organism rapidly in the event that it enters the body again. Abnormalities of the immune system scan lead to unfavorably susceptible illnesses, immunodeficiencies and immune system disarranges.

Hence,the correct answer is option A.