A point structure and the pointer to this structure r are defined below in C. Which statement related to r is wrong?

struct point

{

int x;

int y;

};

struct point *r;

A) r = (point *)malloc (sizeof(struct point));

B) r = (point *)malloc (sizeof(struct point) * 3)

C) r.x = 1; (Assume a correct malloc function has been written)

D) r->x = 1; (Assume a correct malloc function has been written)

Can someone please explain me how do this?