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The tangent to a given curve y=f(x) is p...

The tangent to a given curve `y=f(x)` is perpendicular to the x-axis if

A

`(dx)/(dy)=1`

B

`(dy)/(dx)=0`

C

`(dy)/(dX)=1`

D

`(dx)/(dy)=0`

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The correct Answer is:
D
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