Which one of the following is the buffer solution of strong acidic nature ?

Options

A. `HCOOH+HCOO^(-)`
B. `CH_(3)COOH +CH_(3)COO^(-)`
C. `H_(2)C_(2)O_(4)+C_(2)O_(4)^(2-)`
D. `H_(3)BO_(3)+BO_(3)^(3-)`

Answer

A

Explanation

It is a buffer solution of strong acid and its weak conjugate base .