The ${\mathrm{H}}_{\mathrm{t}}-\mathrm{B}-{\mathrm{H}}_{\mathrm{t}}$  bond angle in diborane where Hydrogens are at terminal

• A

  ${97}^0$

• B

  ${120}^0$

• C

  ${119}^0$

• D

  ${133}^0$