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The equation of incircle of the triangle...

The equation of incircle of the triangle formed by common tangents to the circles `x^(2)+y^(2)=4 and x^(2)+y^(2)-6x+8=0` is

A

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

B

`x^(2)+y^(2)-6x+8=0`

C

`x^(2)+y^(2)-6x+9=0`

D

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

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The correct Answer is:
B
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