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What is the differential equation of all parabolas whose axes are parallel to Y-axis ?

A

`(d^(2) y)/(dx^(2)) = 0`

B

`(d^(2) x)/(dy^(2)) = 0`

C

`(d^(3) x)/(dy^(3)) = 1`

D

`(d^(3) y)/(dx^(3)) = C`

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The correct Answer is:
A
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