Let the curve be represented by $x=2(\cos t+t \sin t)$ and $y=2(\sin t-t \cos t)$. Then the normal at any point '$t$' of the curve is at a distance of . . . . . . units from the origin.

  • A
    $1$
  • B
    $0$
  • C
    $2$
  • D
    $4$

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