Statement-I: Orthoboric acid crystals are hard and cannot be broken easily into the powder form. 

Statement-2: In the solid state $\mathrm{B}{\left(\mathrm{OH}\right)}_3$ units are hydrogen bonded together into two dimensional sheets.

Choose the Correct option:

${\mathrm{H}}_3{\mathrm{BO}}_3$ forms a 2D-layered structure and layers slide over each other.

The $\mathrm{B}{\left(\mathrm{OH}\right)}_3$ units are hydrogen bound together into a two-dimensional sheet with almost hexagonal symmetry in the solid state. Because the layers are relatively far apart $(3,18\text{Å})$, the crystal breaks easily into its first particles.