Assertion [A]: If we cut planaria vertically, we'll get two equal halves.

Reason [R]: Planaria is bilaterally symmetrical.

A is true but R is false

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R is true but A is false

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Both A and R are true and R is the correct explanation for A.

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Both A and R are true but R is not the correct explanation for A.

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Solution

The correct option is C Both A and R are true and R is the correct explanation for A.
Planaria belongs to the phylum Platyhelminthes. The body of these animals is bilaterally symmetrical. In this type of symmetry, the body of the individual can be divided into two equal halves by a single plane. Both these halves will have the same design.

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Assertion [A]: If we cut planaria vertically, we'll get two equal halves. Reason [R]: Planaria is bilaterally symmetrical.

Assertion [A]: If we cut planaria vertically, we'll get two equal halves.

Reason [R]: Planaria is bilaterally symmetrical.