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In the following reaction HC(2)O(4)^(-)(...

In the following reaction `HC_(2)O_(4)^(-)(aq)+PO_(4)^(3-)(aq)hArrHPO_(4)^(-2)(aq)+C_(2)O_(4)^(2-)(aq)`, which are the two Bronsted bases?

A

`HC_(2)O_(4)andPO_(4)"^(2-)`

B

`HPO_(4)"^(2-)andC_(2)O_(4)^(2-)`

C

`PO_(4)"^(3-)andC_(2)O_(4)^(2-)`

D

`HC_(2)O_(4)^(-)`and HPO_(4)^(2-)`

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