Which of the following pathogens undergoes antigenic variation to avoid immune defenses?
candida
cryptococcus
plasmodium
giardia

The correct option is : c. Plasmodium

Explanation:

Antigenic variation is a mechanism in which pathogens alter the carbohydrates or proteins present on their surface, to gain immunity from the immune system of the host. This also allows the pathogen to re-infect the previously infected hosts.

Example: The protozoan parasite, Plasmodium falciparum undergoes antigenic variation.

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c-reactive protein (crp) is an acute phase protein belonging to pentraxin family of proteins, whose levels increases 1000-fold or more in concentration in blood during the occurrence of an injury, inflammation or tissue death.