Which of the following statements is correct for the Bronsted-Lowry acid-base reaction HCN+HCO3=CN+H2CO3.?

A.) HCO3– is the conjugate base of HCN. B.)HCN is the conjugate acid of HCO3–. C.)HCO3– and CN– are a conjugate acid-base pair. D.)more than one correct response E.) no correct response