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Read the following Assertion and Reason and choose the correct option. Assertion: Cnidarians exhibit two basic body forms Reason: They have a central gastro-vascular cavity with a single opening called Hypostome

Options

  1. ABoth Assertion and Reason are true and Reason is correct explanation of Assertion
  2. BBoth Assertion and Reason are true but Reason is not the correct explanation of Assertion
  3. CAssertion is true but the Reason is false
  4. DBoth Assertion are Reason are false

Correct answer

B. Both Assertion and Reason are true but Reason is not the correct explanation of Assertion

Step-by-step solution

Cnidarians exhibit two basic body forms called polyp and medusa (Figure 4.6). The former is a sessile and cylindrical form like Hydra, Adamsia, etc. whereas, the latter is umbrella-shaped and free-swimming like Aurelia or jelly fish.

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