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If the angle between the circlex x^(2) +...

If the angle between the circlex `x^(2) + y^(2) - 2x - 4y + c = 0` and `x^(2) + y^(2) - 4x - 2y + 4 = 0` is `60^(@)`, then c is equal to

A

`(3 + sqrt(5))/(2)`

B

`(6 +- sqrt(5))/(2)`

C

`(9 +- sqrt(5))/(2)`

D

`(7 +- sqrt(5))/(2)`

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The correct Answer is:
D
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