Hoop's process is used for the purification of the metal

The incorrect order of  $1^{st}$  $IP$  of the elements is

When $BCl_3$, is treated with water, it hydrolyses and forms $[B(OH)_4]^-$ only whereas $AlCl_3$ in acidified aqueous solution forms $[Al(H_2O)_6]^{3+}$ ion. Explain what is the hybridizations of boron and aluminum in these species?

The stability of $+ 1$ oxidation state among $Al,Ga, In$ and $Tl$ increases in the sequence

$(i)\,Al\,\xrightarrow{{{N_2}}}\,A$         $(ii)\,Al\,\xrightarrow{c}\,B$

Here $A$ and $B$ on hydrolysis respectively gives