Which of the following acids and their conjugate base would form a buffer with a pH of 8.10?
A. HClO3 pKa= 7.54
B. H2SO3 pKa= 1.77
C. HC2H3O2 pKa= 4.74
D. HNO2 pKa= 3.34
E. HIO pKa= 10.64
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