Which of the following is the equation of a circle in the xy-plane with a center at and a diameter of 4?

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Which of the following is the equation of a circle in the xy-plane with a center at <img alt='images' src='https://www.fatskills.com/images2/SAT/eq04093.png'/><!--<m:math display='inline' overflow='scroll' xmlns:m='http://www.w3.org/1998/Math/MathML'><m:mrow><m:mfenced open='(' close=')'><m:mrow><m:mrow><m:mn>0</m:mn><m:mo>,</m:mo><m:mtext> </m:mtext><m:mn>0</m:mn></m:mrow></m:mrow></m:mfenced></m:mrow></m:math>--> and a diameter of 4?