Which of the following show diagonal relationship?

Which of the following types of hybridization occurs in diborane $(B_2H_6)$?

Which of the following properties describes the diagonal relationship between boron and silicon?

When a mixture of diborane and ammonia is heated,the final product is:

In the structure of borax,the numbers of boron atoms and $B-O-B$ units,respectively,are

$A$ Lewis acid '$X$' reacts with $LiAlH_{4}$ in ether medium to give a highly toxic gas. This gas when heated with $NH_{3}$ gives a compound commonly known as inorganic benzene. The gas is