What will be the output of the program? #include int main() { struct s1 { char *z; int i; struct s1 *p; }; static struct s1 a[] = {{"Nagpur", 1, a+1} , {"Chennai", 2, a+2} , {"Bangalore", 3, a} }; struct s1 *ptr = a; printf("%s,", ++(ptr->z)); printf(" %s,", a[(++ptr)->i].z); printf(" %s", a[--(ptr->p->i)].z); return 0; }

• Nagpur, Chennai, Bangalore
• agpur, hennai, angalore
• agpur, Chennai, angalore
• agpur, Bangalore, Bangalore