Boron form many compound like boric acid, borax inorganc graphite etc. Orthoboric acid contain triangular `BO_(3)^(2-)` units. In the solid the `B(OH)_(3)`units are hydrogen bonded together into `2-D` sheets with almost hexagonal summetry. Borax is used in borax bead best.
Boric acid can behave as a strong acid in presence of
A. Anhydrous `H_(2)SO_(4)`
B. Glycerol
C. Mannitol
D. All of these