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If a large number of people are enclose...

If a large number of people are enclosed in a room then

A

(1) oxygen decreases and `CO_2` increases

B

(2) oxygen increases and `CO_2`decreases

C

(3) oxygen and `CO_2` decreases

D

(4) oxygen and `CO_2` increases

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A
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  8. How much amount of carbondioxide is transported by plasma?

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  12. Blood will lose maximum Oxygen when pass through

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  13. As compared to artery, a vein has

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