Choose the correct alternative.the param...

Choose the correct alternative.the parametric equations of the circle `x^2+y^2+mx+my=0` are

A

`x=-m/2+m/sqrt2 costheta,y=-m/2+m/sqrt2 sintheta`

B

`x=--m/2+m/sqrt2 costheta,y=m/2+m/sqrt2 sintheta`

C

`x=0,y=0`

D

`x=mcostheta,y=msintheta`

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