Q.

Consider the following features.A.  Tympanum.B.  Two pairs of limbsC.  Moist skin.Select the correct set of animals which possess all the above characteristics.

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a

Rana, Testudo, Ichthyophis

b

Bufo, Hyla, Salamandra

c

Calotes, Alligator, Rana

d

Trygon, Bufo, Testudo

answer is B.

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Detailed Solution

The given characteristic are of the class Amphibia. Tympanum is present in both amphibians (e.g., Ichthyophis, Salamandra, Rana, Bufo, Hyla) and reptiles (e.g., Testudo, Chelone, Calotes, Alligator). The skin of reptiles is dry and cornified, whereas amphibian skin is moist. Both amphibians and reptiles have two pairs of pentadactylous limbs (except for apodans and snakes). Ichthyophis is a limbless amphibian.
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Consider the following features.A.  Tympanum.B.  Two pairs of limbsC.  Moist skin.Select the correct set of animals which possess all the above characteristics.