The differential equation for the family...

The differential equation for the family of curves `x^(2)-y^(2)-2ay=0`, where a is an arbitrary constant, is

A

`(x^2+y^2)(dy)/(dx)-2xy=0`

B

`(x^2-y^2)(dy)/(dx)+2xy=0`

C

`(x^2-y^2)(dy)/(dx)-xy=0`

D

`(x^2-y^2)(dy)/(dx)+xy=0`

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The correct Answer is:

A

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