Which of the following properties does not support the anomalous behavior of $Boron$?

Consider the following statements for diborane $(B_2H_6)$:
$1.$ Boron is approximately $sp^3$ hybridized.
$2.$ $B-H-B$ angle is $180^{\circ}$.
$3.$ There are two terminal $B-H$ bonds for each boron atom.
$4.$ There are only $12$ bonding electrons available.
Which of these statements are correct?

In the structure of $B_2H_6$,the number of $BH_2$ groups present in one plane,and the number of $B-H$ terminal bonds,$B-B$ bonds,and $B-H-B$ bridge bonds are respectively:

Dilute aqueous solution of $.......$ acid is used as an antibiotic.

What is the correct order of melting points for the elements of group $13$?

In which of the following molecules is a hydrogen bridge bond present?