Inflammation is an example of the body's second line of defense against a pathogen. Thus, the correct option is B.
What is Pathogen?
A Pathogen may be defined as any form of microorganisms that has the ability to cause disease in living organisms.
Skin, tears, mucous, etc are classified under the body's first line of defense against a pathogen, while the second line of defense includes the inflammatory response and phagocytosis by non-specific leukocytes.
Therefore, the correct option is B.
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