Q 1139223112.     `pH` of a solution containing `0.3 M` `HA` and `0.1 M` `A^- ( K_b` for `A^- = 1.0 × 10^(-5) )` will be

A

`9 – log3`

B

`9 + log3`

C

`7 – log3`

D

`7 +log3`

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