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If normal to the curve y = f(x) is paral...

If normal to the curve y = f(x) is parallel to x-axis, then A) `dy/dx=0` B) `dy/dx=1` C) `dx/dy=0` D) `dx/dy=1`

A

(dy/dx)=0

B

(dy/dx)=1

C

(dx/dy)=0

D

(dx/dy)=1

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