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Multiple choice

Tangent are drawn from (-2, 0) to $y^2 = 8x,$ radius of circle(s) that would touch these tangents and the corresponding chord of contact, can be equal to

  1. $4(\sqrt 2 + 1)$
  2. $4(\sqrt 2 - 1)$
  3. $4 \sqrt 2$
  4. None of these

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