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B
More in artery and less in vein
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C
More in vein and less in artery
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D
Not definite
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Solution
The correct option is C More in vein and less in artery
pH of blood is more in the vein as compared to that in the artery as the plasma of the vein contains deoxygenated blood and dissolved CO2 in the form of bicarbonate ions. These ions increase the alkalinity of the plasma, therefore the pH value of blood is greater in the vein as to that of the artery
So, the correct answer is 'More in vein and less in artery'