A system of two identical rods ($L-$ shaped) of mass $m$ and length $l$ are resting on a peg $P$ as shown in the figure. If the system is displaced in its plane by a small angle $\theta ,$ find the period of oscillations :
  • A$2\pi \sqrt {\frac{{\sqrt 2 l}}{{3g}}} $
  • B$2\pi \sqrt {\frac{{2\sqrt 2 l}}{{3g}}} $
  • C$2\pi \sqrt {\frac{{2l}}{{3g}}} $
  • D$3\pi \sqrt {\frac{l}{{3g}}} $
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