$AlCl_3$ fumes in moist air because.......

In diborane $(B_2H_6)$,the number of $2$-centre-$2$-electron bonds and $3$-centre-$2$-electron bonds respectively are:

$STATEMENT-1$: In water,orthoboric acid behaves as a weak monobasic acid. because
$STATEMENT-2$: In water,orthoboric acid acts as a proton donor.

Identify the correct statements from the following:
$i$. $H_3BO_3$ is a monobasic acid.
$ii$. The correct formula of borax is $Na_2[B_4O_5(OH)_4] \cdot 8H_2O$.
$iii$. $NaBH_4$ is a reducing agent.

The incorrect stability order of $+3$ and $+1$ states of $13^{th}$ group elements (boron family) is

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