One end of a spring of force constant \( k \) is fixed to a vertical wall and the other to a bod...

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One end of a spring of force constant \( k \) is fixed to a vertical wall and the other to a body of mass \( m \) resting on a smooth horizontal surface. There is another wall at a distance \( x_{0} \) from the body. The spring is then compressed by \( 2 x_{0} \) and released. The time taken to strike the wall is :
(A) \( \frac{\pi}{6} \sqrt{\frac{m}{k}} \)
(B) \( \sqrt{\frac{m}{k}} \)
(C) \( \frac{2 \pi}{3} \sqrt{\frac{m}{k}} \)
(D) \( \frac{\pi}{4} \sqrt{\frac{m}{k}} \)
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