In which class of the phylum $Mollusca$ is a closed circulatory system found?

  • A
    $Cephalopoda$
  • B
    $Pelecypoda$
  • C
    $Scaphopoda$
  • D
    $Monoplacophora$

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The second largest phylum of the animal kingdom is .........

The term 'Cephalopoda' refers to a class of animals in which .........

Which of the following is found in the mantle cavity of molluscs?

$A$ : Radula is a rasping organ found in all molluscs.
$R$ : It is made up of vitrodentine.

Radula is a file-like rasping organ for feeding in $-$

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