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What is the equation to the locus of the...

What is the equation to the locus of the centre of a circel of radius 1 unit which rolls inside the circle `x ^(2) +y^(2) -2x +2y -7 =0` ?

A

`x ^(2) +y^(2) -2x + 2y -1 =0`

B

`x ^(2)+y^(2) -2x +2y-2=0`

C

`x ^(2)+y^(2) -2x +2y -3=0`

D

`x ^(2) + y^(2) -2x +2y -4=0`

Text Solution

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The correct Answer is:
B
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