Assertion :Mycoplasmas are pathogenic in animals and plants. Reason: Mycoplasmas lack cell wall and can survive without oxygen.

If both assertion and reason are true and reason is the correct explanation of assertion.

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If both assertion and reason are true but reason is not the correct explanation of assertion.

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If assertion is true but reason is false.

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If both assertion and reason are false.

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Solution

The correct option is B If both assertion and reason are true but reason is not the correct explanation of assertion.
Almost all of the Mycoplasmas are pathogenic in animals and plants. Mycoplasma can infect animal and plants cells because of its adhering ability. They do lack cell wall and can survive. But, this is not the reason for its pathogenicity.
Therefore both the assertion and reason are true but reason is not the correct explanation of assertion.

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