C-Programming-data-structure || 2019 MCQ || 2-mark

Consider the following C program:

#include <stdio.h>
int r()  {
static int num=7 ;
 return num-- ;
 }
 
int main ()  {
 for (r(); r (); r())
printf ("%d", r());
 return 0 ;
 }

Which one of the following values will be displayed on execution of the programs? GATE CSE || 2019 MCQ || 2-mark