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A particle starting from rest, moves in a circle of radius ' \( r \) '. It attains a velocity of \( V_{0} \mathrm{~m} / \mathrm{s} \) in the \( n^{\text {th }} \)
\( \mathrm{P} \) round. Its angular acceleration will be

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(1) \( \frac{V_{0}}{n} \mathrm{rad} / \mathrm{s}^{2} \)
(2) \( \frac{V_{0}}{2 \pi n r^{2}} \mathrm{rad} / \mathrm{s}^{2} \)
(3) \( \frac{V_{0}^{2}}{4 \pi n r^{2}} \mathrm{rad} / \mathrm{s}^{2} \)
(4) \( \frac{V_{0}^{2}}{4 \pi n r} \mathrm{rad} / \mathrm{s}^{2} \)
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