We know that the angular momentum about a point is given by

Where,

m = mass of the object

v= velocity and

r= the perpendicular distance of the line of velocity from the point

Looking into the above figure, we can say, if the point lies on the line, r = 0, otherwise r cannot be zero.

Hence. is correct.

When the point lies on, radius r doesn’t become zero, and hence, angular moment remains as-

So option C, D are correct.