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

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

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