Which of the following is the standard equation of a circle with center at (h‚k) and radius r? O a. (x-h)^2+(y-k)^2=r^2 O b. (x-h)^2+(y+k)^2=r^2 O c. (x+h)^2+(y+k)^2=r^2 d.(x-h)^2-(y-k)^2=r^2

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A: Given that:-

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