Liquid is filled to a height 'h' in a vessel whose side walls are vertical. A hole is made in one of the side walls at depth h' below the surface of liquid such that water emerging from 
hole strikes the ground at maximum horizontal distance, then:

• A

  $\mathrm{h}\text{'}=\frac{\mathrm{h}}{4}$

• B

  $\mathrm{h}\text{'}=\frac{\mathrm{h}}{2}$

• C

  $\mathrm{h}\text{'}=\frac{\mathrm{h}}{3}$

• D

  $\mathrm{h}\text{'}= \mathrm{h}$