Four similar particles of mass m are orbiting in a circle of radius r in the same direction and same speed because of their mutual gravitational attractive force as shown in the figure . Speed of a particle is given by
A. `[(Gm)/(r)((1+2sqrt2)/(4))]^(1/(2))`
B. `root(3)((GM)/(r))`
C. `sqrt((Gm)/(r)(1+2sqrt2))`
D. zero
