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Find the common tangent of y=1+x^(2) and...

Find the common tangent of `y=1+x^(2) and x^(2)+y-1=0`. Also find their point of contact.

A

`(0, -4)`

B

`(0, -3)`

C

`(0,-1)`

D

`(0, 1)`

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The correct Answer is:
D
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