A bead of mass 5 kg is free to slide on the horizontal rod AB. They are connected to two identical springs of natural length h ms. As shown. If initially bead was at O & M is vertically below L then, velocity of bead at point N will be :
A. `5h m//s`
B. `40h//3m//s`
C. `8h m//s`
D. None of these
