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Which of the following represents the correct combination of a taxonomic group with its characteristics?
Group Characteristics
1 Osteicthyes They have to swim constantly to avoid sinking
2 Amphibia Skin is dry without glands except oil gland
3 Aves Air sacs connected to lungs supplement respiration
4 Reptilia Body is covered by dry and cornified skin with dermal scales

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answer is C.

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Detailed Solution

In birds (Aves), air sacs connected to lung supplement ventilation.

Skin is moist in amphibians. Oil gland in present in birds; not amphibians.

Members of Chondrichthyes (not Osteichthyes) have to swim constantly to avoid sinking because they lack air bladder.

Scales of reptiles are epidermal (scales of fishes are dermal).

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