What is produced upon the hydrolysis of $AlCl_3$?

Which of the following is produced by the hydrolysis of diborane $(B_2H_6)$?

The correct orders among the following are
$A$. Atomic radius $: B < Al < Ga < In < Tl$
$B$. Electronegativity $: Al < Ga < In < Tl < B$
$C$. Density $: Tl < In < Ga < Al < B$
$D$. $1^{st}$ Ionisation Energy $: In < Al < Ga < Tl < B$
Choose the correct answer from the options given below $:$

Mention the isotopes of boron.

The Lewis acid character of boron trihalides follows the order:

In the following reaction,assign the correct description for the underlined atom in the product of complete hydrolysis at $R.T.$:
$\underline{I}Cl + H_2O \longrightarrow HIO + HCl$