The species among the following which can act as an acid and as a base is

Options

A. `SO_(4)^(2-)`
B. `HSO_(4)-`
C. `PO_(4)^(3-)`
D. OH-

Answer

B

Explanation

`underset(" "H_(2)SO_(4))underset(+H^(+)darr)(" "HSO_(4))overset(-H)(to)SO_(4)^(2)`