Which of the following differences between Chondrichthyes (cartilaginous fishes) and Osteichthyes (bony fishes) is incorrect?

  • A
    Chondrichthyes - Endoskeleton is cartilaginous,Osteichthyes - Endoskeleton is bony.
  • B
    Chondrichthyes - Respiration through $5-7$ pairs of gills,Osteichthyes - Respiration through $4$ pairs of gills.
  • C
    Chondrichthyes - Air bladder present,Osteichthyes - Air bladder absent.
  • D
    Chondrichthyes - Caudal fin is heterocercal (unequal),Osteichthyes - Caudal fin is homocercal (equal).

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