Water is poured in a vessel at a constant rate $\mathrm{\beta } {\mathrm{m}}^3/\mathrm{s}.$. There is a small hole of area $\mathrm{\alpha }$ at the bottom of the vessel. The maximum level of water in the vessel is proportional to : 

• A

  $\mathrm{\beta }/\mathrm{\alpha }$

• B

  ${\mathrm{\beta }}^2/\mathrm{\alpha }$

• C

  ${\mathrm{\beta }}^2/{\mathrm{\alpha }}^2$

• D

  ${\mathrm{\alpha }}^2/{\mathrm{\beta }}^2$