A) \[NaCl\] and \[NaOH\]
B) \[NaOH\] and \[N{{H}_{4}}OH\]
C) \[C{{H}_{3}}COON{{H}_{4}}\] and \[HCl\]
D) Borax and boric acid
Correct Answer: A
Solution :
Because buffer solution are mixture of weak acid or weak base and their salt.
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