The ${\mathrm{pK}}_{\mathrm{a}}$ of a weak acid, HA, is 4.80. The ${\mathrm{pK}}_{\mathrm{b}}$ of a weak base, BOH, is 4.78. The pH of an aqueous solution of the corresponding salt, BA, will be

• A

  8.58

• B

  4.79

• C

  7.01

• D

  9.22