A right circular conical glass bottle with a base radius $r$ and height $h$ contains a coloured liquid upto half of its height. When the bottle is inverted and held vertically on its tip, the height of the liquid in the bottle is

• A

  $\frac{h}{2}$
• B

  $\frac{h r}{2}$
• Correct answer
  C

  $\frac{7^{\frac{1}{3}} h}{2}$
• D

  $\frac{7^{\frac{1}{3}} h r}{2}$

Hence, the correct answer is option: 'C'.