pH is the measurement of acidity and basicity of any compound. The highest pH is of NaCH3COO, i.e., option D.
NaCH3COO is sodium acetate also written as NaOAc. It is the sodium salt of acetic acid.
This is generally colorless deliquescent salt that has a wide range of uses.
The highest pH is of NaCH3COO whose pH is nearly 8.96.
Thus, the correct option is D,
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