If y'=(x-y)/(x+y) , then its solution is...

If `y'=(x-y)/(x+y)` , then its solution is

A

(a) `y^2+2xy-x^2=c `

B

(b) `y^2+2xy+x^2=c `

C

(c) `y^2-2xy-x^2=c`

D

(d) `y^2-2xy+x^2=c `

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The correct Answer is:

A

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