If $x = 2 + 3 \cos \theta$ and $y = 1 - 3 \sin \theta$ represent a circle,then the centre and radius are:

  • A
    $(2, 1), 9$
  • B
    $(2, 1), 3$
  • C
    $(1, 2), \frac{1}{3}$
  • D
    $(-2, -1), 3$

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