Equation of a common tangent to the para...

Equation of a common tangent to the parabola `y^(2)=4x` and the hyperbola xy=2 is

A

`x+ 2y + 4= 0`

B

`x- 2y+ 4= 0`

C

`4x+ 2y+1= 0`

D

`x+ y+1= 0`

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The correct Answer is:

A

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