A vehicle moves on a horizontal curved road of radius of curvature 50 m height of centre of gravity 1.5 m the distance between the two wheels 2 m and acceleration due to gravity `9.8 m//s ^(2)` . Then the maximum velocity with which it can travel on the road will be
A. `18 m//s`
B. `20 m//s`
C. `19 m//s`
D. `17 m//s`