Which of the following is a characteristic of $Amphibia$?

  • A
    Presence of scales
  • B
    Presence of air bladders
  • C
    Presence of poison glands
  • D
    Absence of scales,moist skin

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$S$ - Statement: $Capelle$ classified frogs and $Ichthyophis$ into $Amphibia$.
$R$ - Reason: Frogs and $Ichthyophis$ possess a three-chambered heart.

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