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In the given figure, a circle is centred at $(1, 2)$. The diameter of the circle is
- (a)$4$
- (b)$\sqrt{5}$
- (c)$2\sqrt{2}$
- (d)$2\sqrt{5}$
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(D) $2\sqrt{5}$
CBSE Class 10 Maths PYQ · Coordinate Geometry · Distance Formula · 1 Mark · March 2026 · Standard
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