Two small particle of equal masses start moving in opposite direction from A in a horizontal circular path of radius r Their tangential velocity at A are v and 2v, respectively as shown. Where will be the first collision in the path of the circle.

Question

a) at distance $\pi \;r$  anticlockwise from A

b) at distance $\large\frac{2\pi}{3} $$r$  anticlockwise from A

c) at distance $\large\frac{\pi}{2} $$r$  clockwise from A

d) at distance $\large\frac{\pi \;r}{2}$  anticlockwise from A