The Hybridisation of boron and oxygen atoms in boric acid $\left({\mathrm{H}}_3{\mathrm{BO}}_3\right)$ are respectively 

• A

  ${\mathrm{Sp}}^3\text{ and }{\mathrm{Sp}}^2$

• B

  ${\mathrm{Sp}}^2\text{ and }{\mathrm{Sp}}^3$

• C

  ${\mathrm{Sp}}^2\text{ and }{\mathrm{Sp}}^2$

• D

  ${\mathrm{Sp}}^3\text{ and }{\mathrm{Sp}}^3$