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Two block A and B of masses 3m and m res...

Two block `A` and `B` of masses `3m` and `m` respectively are connected by a massless and nextensible string. The whole system is suspended by a massless spring as shown in figure. The magnitudes of acceleration of `A` and `B` immediately after the string is cut, are resectively

A

`g,(g)/(3)`

B

`(g)/(3),g`

C

`g, g`

D

`(g)/(3),(g)/(3)`

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The correct Answer is:
B
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