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The circle x^2+y^2+2px=0,p in R,touches ...

The circle `x^2+y^2+2px=0,p in R`,touches the parabola `y^2=4x` externally, then

A

`agt0,blt0`

B

`agt0,bgt0`

C

`alt0,bgt0`

D

`alt0,blt0`

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The correct Answer is:
B, D
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