$\begin{gathered}
{\left[ {Al{{\left( {{H_2}O} \right)}_6}} \right]^{ + 3}} + HCO_3^ - \rightleftarrows {\left[ {Al{{\left( {{H_2}O} \right)}_5}OH} \right]^{ + 2}} + {H_2}C{O_3} \hfill \\
\,\,\,\,\,\,\,\,\,\,\,\,(A)\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,(B)\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,(C)\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,(D) \hfill \\
\end{gathered} $
species behaving as bronsted -lowry acid are
- ✓$(A), (D)$
- B$(A), (C)$
- C$(B), (C)$
- D$(B), (D)$


