Given below are two statements.
Statement I : All cnidarians possess a skeleton composed of calcium carbonate.
Statement II : All cnidarians exhibit metagenesis, i.e., the alternation of polyp and medusa generations.
In light of the above statements, choose the correct answer from the options given below.

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Statement I is incorrect but statement II is correct.

Both statement I and statement II are correct.

Statement I is correct but statement II is incorrect.

Both statement I and statement II are incorrect.

answer is B.

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Detailed Solution

Only some cnidarians (corals) possess skeletons composed of calcium carbonate. Only those cnidarians which exist in both polyp and medusa form (e.g., Obelia) exhibit metagenesis. Some cnidarians like Hydra and Adamsia exist only in polyp form and do not exhibit metagenesis.

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