মানব রক্তে বিদ্যমান বাফার দ্রবণ-

NaHCO3 + H2CO3

CH3COOH + CH3COONa

Na2HPO4 + H3PO4

NH4Cl + NH4OH

Explanation:

Correct Answer is: NaHCO3 + H2CO3

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