Rickettsiae is a group of

Viruses

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Microorganisms

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Bacteria

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PPLO

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Solution

The correct option is B Bacteria
Rickettsia are group of bacteria that are obligate intracellular parasites. They are considered a separate group of bacteria as they are spread arthropod vectors. They have cell wall like bacteria and have no flagella. They are gram-negative bacteria.
Thus, the correct answer is 'Bacteria.'

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