Identify $A$ and $B$ in the given figure.

  • A
    $A-$Blastocyst; $B-$Blastomere
  • B
    $A-$Blastula; $B-$Plasma membrane
  • C
    $A-$Blastomere; $B-$Zona pellucida
  • D
    $A-$Zona pellucida; $B-$Blastomere

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