Given below is the pH versus volume curve for titration of $$\mathrm{Na_2CO_3}$$ in the conical flask with $$\mathrm{HCl}$$.

Choose the correct statement based on the above graph.

A

1st equivalence point represents $$\mathrm{NaHCO_3}$$ getting protonated to $$\mathrm{H_2CO_3}$$.

B

2nd equivalence point represents $$\mathrm{NaHCO_3}$$ getting protonated to $$\mathrm{H_2CO_3}$$.

C

1st equivalence point represents deprotonation of $$\mathrm{HCl}$$ by $$\mathrm{NaHCO_3}$$ alone.

D

2nd equivalence point represents deprotonation of $$\mathrm{HCl}$$ by $$\mathrm{Na_2CO_3}$$ alone.