Two simple pendulums having lengths $l_1$ and $l_2$ with negligible string mass undergo angular displacements $\theta_1$ and $\theta_2$ from their mean positions,respectively. If the angular accelerations of both pendulums are same,then which expression is correct?
- A$\theta_1 l_2^2 = \theta_2 l_1^2$
- B$\theta_1 l_1 = \theta_2 l_2$
- C$\theta_1 l_1^2 = \theta_2 l_2^2$
- D$\theta_1 l_2 = \theta_2 l_1$
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