The correct statement about B_2 H_6 is:

All $\displaystyle \mathrm{B}-\mathrm{H}-\mathrm{B}$ angles are of $\displaystyle 120^{\circ}$.

The two $\displaystyle \mathrm{B}-\mathrm{H}-\mathrm{B}$ bonds are not of same length.

Terminal B-H bonds have less $\displaystyle p$-character when compared to bridging bonds.

Its fragment, $\displaystyle \mathrm{BH}_3$, behaves as a Lewis base.