A)
Characteristic Class Mammary gland; hair on body; pinnae; two pairs of limbs Mammalia,
B)
Characteristic Class Mouth ventral; gills without operculum; skin with placoid scales; persistent notochord Chondrichthyes
C)
Characteristic Class Sucking and circular mouth; jaws absent integument without scales; paired appendages Cyclostomata
D)
Characteristic Class Body covered with feathers; skin moist and glandular; lungs with air sacs fore limbs from wings; Aves
Correct Answer: C
Solution :
Cyclostomata bears sucking and circular mouth with no jaws integument without scales and gills (5-16) are present as paired appendages in lateral sac-like pouches of pharynx. Persistent notochord is a feature of Cyclostomata in not Chondrichthyes. Mammals lack pinnae and in over the skin is dry and skin glands are absent except the oil glands.
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