Which enzyme is present in $RBC$s and plasma to catalyse the given reaction: $CO_2 + H_2O \rightleftharpoons H_2CO_3 \rightleftharpoons H^+ + HCO_3^-$?

  • A
    Carbonic anhydrase
  • B
    Catalase
  • C
    Aldolase
  • D
    Carboxylase

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