Features common to the animals belonging to class-$Amphibia$ and class-$Reptilia$ are

  • A
    Presence of scales with internal fertilization and usually four-chambered heart
  • B
    Presence of tympanum,poikilotherms and usually three-chambered heart
  • C
    Presence of cloaca,oviparous and external fertilization
  • D
    Skin is moist

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Column $-I$ represents the animal class, while Column $-II$ represents the exoskeleton. Choose the correct option:
Column $-I$Column $-II$
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$(B)$ Bony fishes$(ii)$ Epidermal scales
$(C)$ Reptiles$(iii)$ Placoid scales

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