1. $x^2+y^2-4x+5y+9=0$

• A. $r^2+r\left(5\sin \theta +4\cos \theta \right)+9=0$
• B. $r^2+r\left(5\sin \theta +4\cos \theta \right)+9=0$
• C. $r^2+r\left(5\sin \theta +4\cos \theta \right)+9=0$
• D. $r^2+r\left(5\sin \theta +4\cos \theta \right)+9=0$

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