What is true about $RBCs$ in humans?

  • A
    They carry about $20-25$ percent of $CO_2$.
  • B
    They transport $99.5$ percent of $O_2$.
  • C
    They transport about $80$ percent oxygen only and the rest $20$ percent of it is transported in dissolved state in blood plasma.
  • D
    They do not carry $CO_2$ at all.

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Select the $INCORRECT$ statement regarding the transport of respiratory gases.

$CO_2$ is primarily transported in the blood in the form of:

$A$ major percentage $(97 \%)$ of $O_{2}$ is transported by RBCs in the blood. How is the remaining percentage $(3 \%)$ of $O_{2}$ transported?

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Select the favourable conditions required for the formation of oxyhaemoglobin at the alveoli.

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