Which of the following is correct?
(a.)Macropus- Ear pinna, body hair, 4 chambered heart
(b.)Pavo-Long bones filled with bone marrow, forelimbs modified to wings.
(c.) Ichthyophis- Eyes lack eyelids, scales present on skin
(d.)Limulus-Chitinous exoskeleton, respiration through coxal glands

Which one of the following is incorrect for Aves? A Heart is four-chambered and animals are oviparous B The presence of air cavities in bones and the presence of feathers on the body С Digestive tract has additional chambers and animals are homeothermal D The forelimbs are not modified into wings

Which of the following represents the correct combination without any exception {:(,"Characteristics","Class",),((a),"Mouth ventrcal, gills without operculum, skin with placoid scales, persistent notochord","Chondrichthyes",),((b),"Sucking and circular mouth, jaws absent, integument without scales, paired appendages","Cyclostomata",),((c),"Body covered with feather, skin mosit and glandular, fore-limbs form wings, lungs from wings, lungs with air sacs","Aves",),((d),"Mammary gland, hair on body, pinnae, two pair of limbs","Mammalia",):}