Three liquids of densities, ${\rho }_1, {\rho }_2$ and ${\rho }_3$ (with, ${\rho }_1>{\rho }_2>{\rho }_3)$, having the same value of surface tension,$T$ , rise to the same height in three identical capillaries. The angles of contact, ${\theta }_1, {\theta }_2$ and ${\theta }_3$ obey

• A

  $\frac{\pi }{2}>{\theta }_1>{\theta }_2>{\theta }_3\ge 0$
• Correct answer
  B

  $0\le {\theta }_1<{\theta }_2<{\theta }_3<\frac{\pi }{2}$
• C

  $\frac{\pi }{2}<{\theta }_1<{\theta }_2<{\theta }_3<\pi$
• D

  $\pi >{\theta }_1>{\theta }_2>{\theta }_3>\frac{\pi }{2}$

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