Given below are two statements: one is labelled as Assertion $A$ and the other is labelled as Reason $R$.

Assertion $A$ : Boric acid is a weak acid

Reason $R$ : Boric acid is not able to release $H ^{+}$ion on its own. It receives $OH ^{-}$ion from water and releases $H ^{+}$ion.

In the light of the above statements, choose the most appropriate answer from the options given below.

Maximum number of atoms which are present in one plane of $H_3BO_3$?

Which of the following equation is not correctly matched

$N{a_2}{B_4}{O_7}.10{H_2}O \xrightarrow{\Delta } X + NaB{O_2} + {H_2}O$

$X + C{r_2}{O_3}\xrightarrow{\Delta }Y$ (Green coloured)

$X$ and $Y$ are

During metallurgy of aluminium bauxite is dissolved in cryolite because