Which of the following function is more appropriate for reading in a multi-word

Which of the following function is more appropriate for reading in a multi-word string?

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1) What is the output of this C code?

#include <stdio.h>
     #include <string.h>
     int main()
     {
         char *str = "hello, world";
         char str1[9];
         strncpy(str1, str, 9);
         printf("%s %d", str1, strlen(str1));
     }

2) What is the output of this C code?

#include <stdio.h>
     int main()
     {
         char *str = "hello, world\n";
         printf("%d", strlen(str));
       }

3) What will be the output of the program ?

 #include<stdio.h>
 int main()
 {
     printf(2+"C Programming MCQ on Study 2 Online\n");
     return 0;
 }

4) The library function used to find the last occurrence of a character in a string is

5) Which of the following function is more appropriate for reading in a multi-word string?