Assertion :Sponges are multicellular. Reason: Sponges have tissue level of organization.

Both assertion and reason are correct and reason is the correct explanation for assertion.

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Both assertion and reason are correct but reason is not the correct explanation for assertion.

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Assertion is correct but reason is incorrect.

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Both assertion and reason are incorrect.

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Solution

The correct option is C Assertion is correct but reason is incorrect.
Sponges are multicellular, but the cellular level of organization means that the cells do not form organized tissues. Sponges do have specialized cells and there are cooperation and coordination among the cells, but it is limited.
The cells of the body perform their functions more or less independently exhibiting division of labour. Hence, they possess a cellular level of organization. Tissue level organization is found in flatworms.
Therefore, the correct answer is option C.

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