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Which buffer pair keeps blood pH at 7.36 to 7.42?

ANH4OH and NH4Cl
BHCO3- and H2CO3
CCH3COOH and CH3COONa
DHNO3 and KNO3 mix
Answer & Solution
Correct answer: B. HCO3- and H2CO3
The bicarbonate and carbonic acid pair acts as the main buffer of blood.
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