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 `90^@` angle at centre. Radius joining their interface make an angle `alpha` with vertical. Ratio `(d_1)/(d_2)` is :
A
`(1+tanalpha)/(1-tanalpha)`
B
`(1+sinalpha)/(1-cosalpha)`
C
`(1+sinalpha)/(1-sinalpha)`
D
`(1+cosalpha)/(1-cosalpha)`
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