What is the output of this program?

#include<stdio.h>
#include<string.h>
 
int main()
{
    int fd[2];
    int count;
    char buffer[6];
    if( pipe(fd) != 0)
        perror("pipe");
    memset(buffer,'\0',6);
    count=write(fd[1],"Linux",6);
    read(fd[0],buffer,6);
    printf("%s\n",buffer);
    return 0;put
}

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