a) When the string is severed at point B, the particle’s tangential velocity will be vertically downward, and the bob will travel in the same direction.

b) When the string is severed at point C, the particle’s tangential velocity is horizontal, and the particle moves along a half-parabolic path.

c) When the string is severed at point X, an angle is produced, and the particle will travel on a parabolic route until the bob reaches the highest point.