A large tank filled with water to a height ?h? is to be emptied through a small hole at the bottom. The ratio of time taken for the level of water to fall from h to \[\frac{h}{2}\] and from \[\frac{h}{2}\] to zero is [EAMCET (Engg.) 2003]

• A.            \[\sqrt{2}\]                           
• B.            \[\frac{1}{\sqrt{2}}\]        
• C.            \[\sqrt{2}-1\]                       
• D.            \[\frac{1}{\sqrt{2}-1}\]