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Friction is absent everywhere and the threads, spring and pulleys are massless. If `m_(A) = m_(B) = M`, then the angular frequency of the system for small oscillations will be

A

`sqrt((2k)/( 4m))`

B

`sqrt((4k)/( 5m))`

C

`sqrt((6k)/( 7m))`

D

`sqrt((8k)/( 5m))`

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The correct Answer is:
B
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