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The length of the transverse common tang...

The length of the transverse common tangent of the circle `x^(2) + y^(2) - 2x + 4y + 4 = 0 and x^(2) + y^(2) + 4x -2y + 1 = 0` is

A

A `sqrt3`

B

B `sqrt17`

C

C `sqrt15`

D

D 3

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The correct Answer is:
D
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