Question

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Answer 1

Answer:

every 100 ml contains 4 ml CO2.

so,. 500 ml blood contains 20 ml CO2.

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Answer 2

$\huge\mathfrak{Answer:}$

As we know that 100mL of oxygenated blood contains 4 mL of CO2

so we can conclude that 500mL of oxygenated blood contains 20mL of CO2

so option (3) is correct.