Which of the following statements is correct for boric acid?
- AIt has a monoclinic crystal system.
- BIt has axial distances $a \neq b \neq c$.
- CIt has the same crystal system as potassium dichromate.
- DIts crystal system includes a body-centered unit cell.
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$(I)$ The stability of $+1$ oxidation state follows the order $Tl > In > Ga$
$(II)$ Boron has the lowest melting point and boiling point as it is a non-metal
$(III)$ Boron shows a maximum covalency of $4$ in its compounds
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