Consider the $M(OH{)}_3$ formed by all the group 13 elements. The correct sequence of acidic strength of hydroxides $\left[M\right(OH{)}_3]$ is:-

The correct option is D $B(OH{)}_3>Al(OH{)}_3>Ga(OH{)}_3>In(OH{)}_3>Tl(OH{)}_3$
As we know,

I.P $\propto$ acidic strength of hydroxides

and $\underset{I.P.}{\overset{B>Al>Ga>In>Ti}{\leftarrow }}$

So order of acidic strength is

$B(OH{)}_3>Al(OH{)}_3>Ga(OH{)}_3>Ti(OH{)}_3$