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Which of the following animals are bilaterally symmetrical?
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A. 1 & 2

B. 2 & 4

C. 3 & 4

D. 1 & 3

Correct Answer : B.


Animal 2 and 4 are bilaterally symmetrical. Bilateral symmetry is a symmetrical arrangement, as of an organism or a body part, along a central axis, so that the body is divided into equivalent right and left halves by only one plane.

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