A uniform rod of mass $m$ and length $I$ is suspended about its end, Time period of small angular oscillations is ..........
  • A$2 \pi \sqrt{\frac{l}{g}}$
  • B$2 \pi \sqrt{\frac{2 l}{g}}$
  • C$2 \pi \sqrt{\frac{2 l}{3 g}}$
  • D$2 \pi \sqrt{\frac{I}{3 g}}$
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