${\text{pK}}_{\text{a}}$ of a weak acid $\left(\text{HA}\right)$ and ${\text{pK}}_{\text{b}}$ of a weak base $\left(\text{BOH}\right)$ are $3.2$ and $3.4$ respectively. The $\text{pH}$ of their salt $\left(\text{AB}\right)$ solution at ${\text{25}}^{\text{o}}\text{C}$ is

• Correct answer
  A

  $6.9$
• B

  $7.0$
• C

  $1.0$
• D

  $7.2$

Hence, the correct answer is option: 'A'.