A)
Characteristics Class Body covered with feathers; skin moist and glandular; fore-limbs form wings; lungs with air sacs Aves
B)
Characteristics Class Mammary gland; hair on body; pinnae; two pairs of limbs Mammalia
C)
Characteristics Class Mouth ventral; gills without operculum; skin with placoid scales; persistent notochord Chondrichthyes
D)
Characteristics Class Sucking and circular mouth; jaws absent, integument without scales; paired appendages Cyclostomata
Correct Answer: C
Solution :
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