There is a circular tube in a vertical plane. Two liquids which do not mix and of densities $d_1$ and $d_2$ are filled in the tube. Each liquid subtends a $90^o$ angle at the centre. The radius joining their interface makes an angle $\alpha$ with the vertical. The ratio $\frac{d_1}{d_2}$ is

  • A
    $\frac{1 + \cos\alpha}{1 - \cos\alpha}$
  • B
    $\frac{1 + \tan\alpha}{1 - \tan\alpha}$
  • C
    $\frac{1 + \sin\alpha}{1 - \cos\alpha}$
  • D
    $\frac{1 + \sin\alpha}{1 - \sin\alpha}$

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