A body starts falling from height 'h' and travels distance $\frac{\mathrm{h}}{2}$ during last second of motion then time of flight is (in second ):

• A

  $\sqrt{2}-1$

• B

  $2+\sqrt{2}$

• C

  $\sqrt{2}+\sqrt{3}$

• D

  $\sqrt{3}+2$