For the curve 4x^(5)=5y^(4), the ratio o...

For the curve `4x^(5)=5y^(4)`, the ratio of the cube of the sub-tangent at a point on the curve to the square of the sub-normal at the same point is :

A

`(4/5)^4

B

`(5/4)^4`

C

`x(4/5)^4`

D

`y(5/4)^4`

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