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In the arrangement shown below pulleys a...

In the arrangement shown below pulleys are mass less and frictionless and threads are in responsible block of mass `m_(1)` will remain at rest if :

A

`4/m_(1)=1/m_(2)+1/m_(3)`

B

`m_(1)=m_(2)=m_(3)`

C

`1/m_(1)=1/m_(2)+1/m_(3)`

D

`1/m_(3)=2/m_(2)+3/m_(1)`

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The correct Answer is:
a
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