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The value of 'c' for which the set {(x, ...

The value of 'c' for which the set `{(x, y)|x^2+y^2+2xle1}bigcap{(x, y)|x-y+cge0)}` contains only one point in common is

A

`(-infty,-1]bigcup[3,infty)`

B

{-1, 3}

C

{-3}

D

{-1}

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The correct Answer is:
D
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