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Question


A circle C of radius 2 units rolls inside the ring of the circle x2+y2+8x−2y−19=0. Then the locus of the centre of C

A
x2+y2+8x2y47=0
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B
x2+y2+8x2y1=0
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C
x2+y2+8x2y+1=0
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D
x2+y28x+2y+1=0
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