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x² + y² – 4x + 5y + 9 = 0 বৃত্তের পোলার সমীকরণ কোনটি?

r^{2} + r (5 \sin θ + 4 \cos θ) + 9 = 0

r^{2} + r (5 \sin θ - 4 \cos θ) + 9 = 0

r^{2} - r (5 \sin θ + 4 \cos θ) + 9 = 0

r^{2} - r (5 \sin θ - 4 \cos θ) + 9 = 0

ANSWER : 4

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