The velocity of the centre of mass of the system as shown in the figure is

  • A
    $\left( \frac{2 - 2\sqrt{3}}{3} \right)\hat{i} - \frac{1}{3}\hat{j}$
  • B
    $\left( \frac{2 + 2\sqrt{3}}{3} \right)\hat{i} - \frac{2}{3}\hat{j}$
  • C
    $4\hat{i}$
  • D
    None of these

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