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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

x+y+1=0

D

4x+2y+1=0

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The correct Answer is:
A
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