With the vertices of a Delta ABC as cent...

With the vertices of a `Delta ABC` as centre three circles are described each touching the other two circles externally. If the sides of the triangles are 9 cm, 7 cm and 6 cm. Then, the radius of the circles (in cm) are

4 cm, 5 cm, 2 cm

6 cm, 3 cm, 2 cm

4 cm, 3 cm, 2 cm

none of these

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