মানবরক্তে কোন বাফার দ্রবণটি বিদ্যমান?

A $NaHCO_{3}+H_{2}CO_{3}$

B $CH_{3}COONA+CH_{3}COOH$

C $Na_{2}HPO_{3}+H_{3}PO_{3}$

D $NH_{4}CL+NH_{4}OH$

Solution

Correct Answer: Option A

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