Bulk of carbon dioxide $(CO_2)$ released from body tissues into the blood is present as

  • A
    $70\%$ carbamino-haemoglobin and $30\%$ as bicarbonate
  • B
    carbamino-haemoglobin in $RBCs$
  • C
    bicarbonate in blood plasma and $RBCs$
  • D
    free $CO_2$ in blood plasma

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