Four particles, each of mass M and equid...

Four particles, each of mass M and equidistant from each other, move along a circle of radius R under the action of their mutual gravitational attraction. The speed of each particle is

A

`sqrt((GM)/R)`

B

`1/2 sqrt((GM)/R)`

C

`1/3 sqrt((GM)/R)`

D

`1/4 sqrt((GM)/R)`

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