Boric acid :

The inter-molecular hydrogen bonds that cause boric acid to exist in polymeric form.

The production of monofilament fiberglass, also known as textile fiberglass, is the main industrial usage of boric acid. The glass used in LCD flat panel screens is made using boric acid.

Because it is a weak monobasic acid that is soluble in water, the boron atom completes its octet by receiving OH from water molecules in aqueous solution.

$\mathrm{B}(\mathrm{OH}{)}_3+2{\mathrm{H}}_2\mathrm{O}\rightleftharpoons {\left[\mathrm{B}(\mathrm{OH}{)}_4\right]}^{-}+{\mathrm{H}}_3{\mathrm{O}}^{+}$

Since the aqueous solution of borax contains an equal amount of boric acid and its salt, a weak acid, it is also utilised as a buffer.

$\left[{\mathrm{B}}_4{\mathrm{O}}_5(\mathrm{OH}{)}_4\right]+5{\mathrm{H}}_2\mathrm{O}\rightleftharpoons 2{\left[\mathrm{B}(\mathrm{OH}{)}_4\right]}^{-}\left(\text{salt }\right)+2\mathrm{B}(\mathrm{OH}{)}_3$ (weakacid)

Hence, the correct options are A, B, and D.