What is the output of this program?

#include<stdio.h>
#include<stdlib.h>
struct st{
    int a;
    char b;
};
 
int main()
{
    struct st *st_ptr;
    st_ptr = malloc(sizeof(struct st));
    printf("%d\n",sizeof(struct st));
    return 0;
}

A. countw B. wcount C. wc D. count p E. None of the above

A. dm B. rm C. delete D. erase E. None of the above

A. rdir B. remove C. rd D. rmdir E. None of the above

A. x B. y C. a D. z E. None of the above